AdventOfCode/2021/day01.cpp
2021-12-20 15:47:07 +01:00

45 lines
1.0 KiB
C++

#include <iostream>
#include <fstream>
#include <vector>
using namespace std;
int main(int argc, char* argv[]) {
if (argc <= 1) {
cerr << "No input file was given!" << endl;
return 1;
}
ifstream input;
input.open(argv[1]);
if (input.is_open()) {
vector<int> array;
int x, y, count;
while (input >> x) {
array.push_back(x);
}
count = 0;
for (unsigned int i = 0; i < array.size() - 1; ++i) {
if (array[i + 1] > array[i]) {
count++;
}
}
cout << count << endl;
count = 0;
for (unsigned int i = 0; i < array.size() - 3; ++i) {
y = array[i] + array[i + 1] + array[i + 2];
x = array[i + 1] + array[i + 2] + array[i + 3];
if (x > y) {
count++;
}
}
cout << count << endl;
}
else {
cerr << "Unable to open file!";
return 1;
}
input.close();
return 0;
}