advent-of-code-cpp-2021/day03/day3Part1.cpp

42 lines
1 KiB
C++

#include <iostream>
#include <cmath>
#include <fstream>
using namespace std;
int main (void)
{
char currentLine[12];
int bitTrue[12] = {};
int bitFalse[12] = {};
int gammaRateBin[12] = {};
int epsilonRateBin[12] = {};
int gammaRateDec = 0;
int epsilonRateDec = 0;
int powerConsumption;
ifstream readFile ("data/input.txt", ios::in);
while(readFile >> currentLine)
{
for(int i=0;i<12;i++)
{
if(currentLine[i] == '0') bitFalse[i]++;
else if(currentLine[i] == '1') bitTrue[i]++;
else cout << "Error!!!";
}
}
for(int i=0;i<12;i++)
{
if(bitTrue[i] > bitFalse[i]) gammaRateBin[i] = 1;
else epsilonRateBin[i] = 1;
}
for(int i=0;i<12;i++)
{
gammaRateDec += gammaRateBin[i] * pow(2,11-i);
epsilonRateDec += epsilonRateBin[i] * pow(2,11-i);
}
powerConsumption = gammaRateDec * epsilonRateDec;
cout << "\nPower Consumption: " << powerConsumption;
return 0;
}