diff --git a/.gitignore b/.gitignore
index 53eaa21..c977131 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 /target
 **/*.rs.bk
+.vscode
diff --git a/input/day02.txt b/input/day02.txt
new file mode 100644
index 0000000..432f8db
--- /dev/null
+++ b/input/day02.txt
@@ -0,0 +1 @@
+1,0,0,3,1,1,2,3,1,3,4,3,1,5,0,3,2,1,9,19,1,19,5,23,2,6,23,27,1,6,27,31,2,31,9,35,1,35,6,39,1,10,39,43,2,9,43,47,1,5,47,51,2,51,6,55,1,5,55,59,2,13,59,63,1,63,5,67,2,67,13,71,1,71,9,75,1,75,6,79,2,79,6,83,1,83,5,87,2,87,9,91,2,9,91,95,1,5,95,99,2,99,13,103,1,103,5,107,1,2,107,111,1,111,5,0,99,2,14,0,0
\ No newline at end of file
diff --git a/input/day05.txt b/input/day05.txt
new file mode 100644
index 0000000..d89c0ae
--- /dev/null
+++ b/input/day05.txt
@@ -0,0 +1 @@
+3,225,1,225,6,6,1100,1,238,225,104,0,1102,68,5,225,1101,71,12,225,1,117,166,224,1001,224,-100,224,4,224,102,8,223,223,101,2,224,224,1,223,224,223,1001,66,36,224,101,-87,224,224,4,224,102,8,223,223,101,2,224,224,1,223,224,223,1101,26,51,225,1102,11,61,224,1001,224,-671,224,4,224,1002,223,8,223,1001,224,5,224,1,223,224,223,1101,59,77,224,101,-136,224,224,4,224,1002,223,8,223,1001,224,1,224,1,223,224,223,1101,11,36,225,1102,31,16,225,102,24,217,224,1001,224,-1656,224,4,224,102,8,223,223,1001,224,1,224,1,224,223,223,101,60,169,224,1001,224,-147,224,4,224,102,8,223,223,101,2,224,224,1,223,224,223,1102,38,69,225,1101,87,42,225,2,17,14,224,101,-355,224,224,4,224,102,8,223,223,1001,224,2,224,1,224,223,223,1002,113,89,224,101,-979,224,224,4,224,1002,223,8,223,1001,224,7,224,1,224,223,223,1102,69,59,225,4,223,99,0,0,0,677,0,0,0,0,0,0,0,0,0,0,0,1105,0,99999,1105,227,247,1105,1,99999,1005,227,99999,1005,0,256,1105,1,99999,1106,227,99999,1106,0,265,1105,1,99999,1006,0,99999,1006,227,274,1105,1,99999,1105,1,280,1105,1,99999,1,225,225,225,1101,294,0,0,105,1,0,1105,1,99999,1106,0,300,1105,1,99999,1,225,225,225,1101,314,0,0,106,0,0,1105,1,99999,7,677,677,224,1002,223,2,223,1006,224,329,1001,223,1,223,1007,226,226,224,1002,223,2,223,1006,224,344,1001,223,1,223,1108,226,677,224,102,2,223,223,1005,224,359,1001,223,1,223,1107,226,677,224,1002,223,2,223,1006,224,374,101,1,223,223,1107,677,226,224,1002,223,2,223,1006,224,389,101,1,223,223,7,226,677,224,1002,223,2,223,1005,224,404,101,1,223,223,1008,677,226,224,102,2,223,223,1005,224,419,101,1,223,223,1008,226,226,224,102,2,223,223,1006,224,434,101,1,223,223,107,226,226,224,1002,223,2,223,1005,224,449,1001,223,1,223,108,226,677,224,102,2,223,223,1005,224,464,101,1,223,223,1108,677,226,224,102,2,223,223,1005,224,479,101,1,223,223,1007,226,677,224,102,2,223,223,1006,224,494,101,1,223,223,107,677,677,224,102,2,223,223,1005,224,509,101,1,223,223,108,677,677,224,102,2,223,223,1006,224,524,1001,223,1,223,8,226,677,224,102,2,223,223,1005,224,539,101,1,223,223,107,677,226,224,102,2,223,223,1005,224,554,1001,223,1,223,8,226,226,224,102,2,223,223,1006,224,569,1001,223,1,223,7,677,226,224,1002,223,2,223,1005,224,584,1001,223,1,223,1108,226,226,224,102,2,223,223,1005,224,599,1001,223,1,223,1107,677,677,224,1002,223,2,223,1006,224,614,1001,223,1,223,1007,677,677,224,1002,223,2,223,1006,224,629,1001,223,1,223,108,226,226,224,102,2,223,223,1005,224,644,1001,223,1,223,8,677,226,224,1002,223,2,223,1005,224,659,1001,223,1,223,1008,677,677,224,1002,223,2,223,1006,224,674,1001,223,1,223,4,223,99,226
\ No newline at end of file
diff --git a/input/input05.txt b/input/input05.txt
new file mode 100644
index 0000000..d89c0ae
--- /dev/null
+++ b/input/input05.txt
@@ -0,0 +1 @@
+3,225,1,225,6,6,1100,1,238,225,104,0,1102,68,5,225,1101,71,12,225,1,117,166,224,1001,224,-100,224,4,224,102,8,223,223,101,2,224,224,1,223,224,223,1001,66,36,224,101,-87,224,224,4,224,102,8,223,223,101,2,224,224,1,223,224,223,1101,26,51,225,1102,11,61,224,1001,224,-671,224,4,224,1002,223,8,223,1001,224,5,224,1,223,224,223,1101,59,77,224,101,-136,224,224,4,224,1002,223,8,223,1001,224,1,224,1,223,224,223,1101,11,36,225,1102,31,16,225,102,24,217,224,1001,224,-1656,224,4,224,102,8,223,223,1001,224,1,224,1,224,223,223,101,60,169,224,1001,224,-147,224,4,224,102,8,223,223,101,2,224,224,1,223,224,223,1102,38,69,225,1101,87,42,225,2,17,14,224,101,-355,224,224,4,224,102,8,223,223,1001,224,2,224,1,224,223,223,1002,113,89,224,101,-979,224,224,4,224,1002,223,8,223,1001,224,7,224,1,224,223,223,1102,69,59,225,4,223,99,0,0,0,677,0,0,0,0,0,0,0,0,0,0,0,1105,0,99999,1105,227,247,1105,1,99999,1005,227,99999,1005,0,256,1105,1,99999,1106,227,99999,1106,0,265,1105,1,99999,1006,0,99999,1006,227,274,1105,1,99999,1105,1,280,1105,1,99999,1,225,225,225,1101,294,0,0,105,1,0,1105,1,99999,1106,0,300,1105,1,99999,1,225,225,225,1101,314,0,0,106,0,0,1105,1,99999,7,677,677,224,1002,223,2,223,1006,224,329,1001,223,1,223,1007,226,226,224,1002,223,2,223,1006,224,344,1001,223,1,223,1108,226,677,224,102,2,223,223,1005,224,359,1001,223,1,223,1107,226,677,224,1002,223,2,223,1006,224,374,101,1,223,223,1107,677,226,224,1002,223,2,223,1006,224,389,101,1,223,223,7,226,677,224,1002,223,2,223,1005,224,404,101,1,223,223,1008,677,226,224,102,2,223,223,1005,224,419,101,1,223,223,1008,226,226,224,102,2,223,223,1006,224,434,101,1,223,223,107,226,226,224,1002,223,2,223,1005,224,449,1001,223,1,223,108,226,677,224,102,2,223,223,1005,224,464,101,1,223,223,1108,677,226,224,102,2,223,223,1005,224,479,101,1,223,223,1007,226,677,224,102,2,223,223,1006,224,494,101,1,223,223,107,677,677,224,102,2,223,223,1005,224,509,101,1,223,223,108,677,677,224,102,2,223,223,1006,224,524,1001,223,1,223,8,226,677,224,102,2,223,223,1005,224,539,101,1,223,223,107,677,226,224,102,2,223,223,1005,224,554,1001,223,1,223,8,226,226,224,102,2,223,223,1006,224,569,1001,223,1,223,7,677,226,224,1002,223,2,223,1005,224,584,1001,223,1,223,1108,226,226,224,102,2,223,223,1005,224,599,1001,223,1,223,1107,677,677,224,1002,223,2,223,1006,224,614,1001,223,1,223,1007,677,677,224,1002,223,2,223,1006,224,629,1001,223,1,223,108,226,226,224,102,2,223,223,1005,224,644,1001,223,1,223,8,677,226,224,1002,223,2,223,1005,224,659,1001,223,1,223,1008,677,677,224,1002,223,2,223,1006,224,674,1001,223,1,223,4,223,99,226
\ No newline at end of file
diff --git a/src/main.rs b/src/main.rs
index 1ac9056..2bad024 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,5 +1,5 @@
 mod tasks;
 
 fn main() {
-    tasks::day08::run();
+    tasks::day05::run();
 }
diff --git a/src/tasks/day05.rs b/src/tasks/day05.rs
new file mode 100644
index 0000000..8b2d4d9
--- /dev/null
+++ b/src/tasks/day05.rs
@@ -0,0 +1,157 @@
+#[allow(dead_code)]
+pub fn run() {
+    let input = std::fs::read_to_string("input/day05.txt").unwrap();
+    let ram: Vec<i32> = input
+        .split(",")
+        .map(|s| s.parse::<i32>().unwrap())
+        .collect();
+    task1(ram.clone());
+}
+
+struct IntCodeComputer {
+    input_storage: Vec<i32>,
+    output_storage: Vec<i32>,
+    pc: usize,
+    ram: Vec<i32>,
+}
+
+#[derive(PartialEq, Debug)]
+enum OpCode {
+    Add,
+    Multiply,
+    Input,
+    Output,
+    Terminate,
+}
+
+#[derive(Debug)]
+enum OpParam {
+    Immediate(i32),
+    Memory(usize),
+}
+
+impl OpParam {
+    fn from(val: i32, type_number: i32) -> Self {
+        match type_number {
+            0 => OpParam::Memory(val as usize),
+            1 => OpParam::Immediate(val),
+            _ => unreachable!("unexpected parameter"),
+        }
+    }
+
+    fn retrieve(&self, memory: &Vec<i32>) -> i32 {
+        match self {
+            OpParam::Immediate(v) => *v,
+            OpParam::Memory(i) => memory[*i],
+        }
+    }
+
+    fn store(&self, memory: &mut Vec<i32>, value: i32) {
+        match self {
+            OpParam::Immediate(_) => panic!("cannot save to immediate position"),
+            OpParam::Memory(i) => memory[*i] = value,
+        }
+    }
+}
+
+#[derive(Debug)]
+struct Op {
+    opcode: OpCode,
+    params: Vec<OpParam>,
+}
+
+impl Op {
+    fn from(pc: usize, memory: &Vec<i32>) -> Self {
+        //opcode: 123xx -> 1, 2, 3: parameter type for parameters 1-3, xx = actual op code
+        let mut opcode = memory[pc];
+        let p_type1 = opcode / 10_000;
+        opcode %= 10_000;
+        let p_type2 = opcode / 1000;
+        opcode %= 1000;
+        let p_type3 = opcode / 100;
+        opcode %= 100;
+        match opcode {
+            1 => Op {
+                opcode: OpCode::Add,
+                params: vec![
+                    OpParam::from(memory[pc + 1], p_type3),
+                    OpParam::from(memory[pc + 2], p_type2),
+                    OpParam::from(memory[pc + 3], p_type1),
+                ],
+            },
+            2 => Op {
+                opcode: OpCode::Multiply,
+                params: vec![
+                    OpParam::from(memory[pc + 1], p_type3),
+                    OpParam::from(memory[pc + 2], p_type2),
+                    OpParam::from(memory[pc + 3], p_type1),
+                ],
+            },
+            3 => Op {
+                opcode: OpCode::Input,
+                params: vec![OpParam::from(memory[pc + 1], p_type3)],
+            },
+            4 => Op {
+                opcode: OpCode::Output,
+                params: vec![OpParam::from(memory[pc + 1], p_type3)],
+            },
+            99 => Op {
+                opcode: OpCode::Terminate,
+                params: vec![],
+            },
+            _ => unreachable!("unknown op code {}", opcode),
+        }
+    }
+}
+
+impl IntCodeComputer {
+    fn new(input: Vec<i32>, memory: Vec<i32>) -> Self {
+        IntCodeComputer {
+            input_storage: input,
+            output_storage: Vec::new(),
+            pc: 0,
+            ram: memory,
+        }
+    }
+
+    fn run_until_end(&mut self) {
+        let mut op = Op::from(self.pc, &self.ram);
+        let mut inputs = self.input_storage.iter();
+        while op.opcode != OpCode::Terminate {
+            match op.opcode {
+                OpCode::Add => {
+                    let r = op.params[0].retrieve(&self.ram) + op.params[1].retrieve(&self.ram);
+                    op.params[2].store(&mut self.ram, r);
+                    self.pc += 4;
+                }
+                OpCode::Multiply => {
+                    let r = op.params[0].retrieve(&self.ram) * op.params[1].retrieve(&self.ram);
+                    op.params[2].store(&mut self.ram, r);
+                    self.pc += 4;
+                }
+                OpCode::Input => {
+                    let v = inputs.next().expect("Not enough inputs given");
+                    op.params[0].store(&mut self.ram, *v);
+                    self.pc += 2;
+                }
+                OpCode::Output => {
+                    self.output_storage.push(op.params[0].retrieve(&self.ram));
+                    self.pc += 2;
+                }
+                OpCode::Terminate => {}
+            }
+            op = Op::from(self.pc, &self.ram);
+        }
+    }
+
+    fn get_output(&self) -> &[i32] {
+        self.output_storage.as_slice()
+    }
+}
+
+fn task1(ram: Vec<i32>) {
+    let mut computer = IntCodeComputer::new(vec![1], ram);
+    computer.run_until_end();
+    println!("{:?}", computer.get_output());
+    println!("Task 1: {}", computer.get_output().last().unwrap());
+}
diff --git a/src/tasks/mod.rs b/src/tasks/mod.rs
index cb25c41..b42f001 100644
--- a/src/tasks/mod.rs
+++ b/src/tasks/mod.rs
@@ -1,5 +1,6 @@
 pub mod day01;
 pub mod day03;
 pub mod day04;
+pub mod day05;
 pub mod day06;
 pub mod day08;