Food for Pets

#include <iostream>
#include <string>
#include <cmath>
using namespace std;

int main() {
    int days, dailyDogFood, dailyCatFood, eatenDogsFood = 0, eatenCatsFood = 0;
    cin >> days;

    double availableFood, cookies = 0;
    cin >> availableFood;

    for (int i = 1; i <= days; i++) {
        cin >> dailyDogFood >> dailyCatFood;

        if (i % 3 == 0) {
            cookies += 0.1 * (dailyDogFood + dailyCatFood);
        }
        eatenDogsFood += dailyDogFood;
        eatenCatsFood += dailyCatFood;
    }

    double totalEatenFood = eatenDogsFood + eatenCatsFood;

    printf("Total eaten biscuits: %igr.\n", (int)round(cookies));
    printf("%.2f%% of the food has been eaten.\n", 100.0 * totalEatenFood / availableFood);
    printf("%.2f%% eaten from the dog.\n", 100.0 * eatenDogsFood / totalEatenFood);
    printf("%.2f%% eaten from the cat.\n", 100.0 * eatenCatsFood / totalEatenFood);

    return 0;
}