50 lines
1.0 KiB
C++
50 lines
1.0 KiB
C++
#include <iostream>
|
|
#include <fstream>
|
|
#include <vector>
|
|
|
|
using namespace std;
|
|
|
|
int main() {
|
|
cout << "Advent of Code 2021 - Day 3 Part 1" << endl;
|
|
|
|
unsigned int gamma = 0;
|
|
unsigned int epsilon = 0;
|
|
|
|
vector<vector<char>> inputBits;
|
|
|
|
ifstream filein("input");
|
|
for(string line; getline(filein, line);) {
|
|
vector<char> bits;
|
|
for(int i = 0; i < 12; i++) {
|
|
if (line[i] == '1') {
|
|
bits.push_back(1);
|
|
}
|
|
else {
|
|
bits.push_back(0);
|
|
}
|
|
}
|
|
inputBits.push_back(bits);
|
|
}
|
|
|
|
for(int x = 0; x < 12; x++) {
|
|
int greater = 0;
|
|
|
|
for(int i = 0; i < inputBits.size(); i++) {
|
|
if(inputBits[i][x] == 1) {
|
|
greater++;
|
|
}
|
|
}
|
|
|
|
if(greater > (inputBits.size() / 2)) {
|
|
gamma |= 1UL << 11 - x;
|
|
} else {
|
|
epsilon |= 1UL << 11 - x;
|
|
}
|
|
}
|
|
|
|
cout << gamma << endl;
|
|
cout << epsilon << endl;
|
|
cout << gamma * epsilon << endl;
|
|
|
|
return 0;
|
|
} |