27 задача

#include <stdio.h>
using namespace std;
int main(){
    int n;
    scanf("%d", &n);
    int kr2, kr7, kr14, ans;
    kr2 = 0;
    kr7 = 0;
    kr14 = 0;
    ans = 0;
    for(int i = 0; i < n; i++){
        int x;
        scanf("%d", &x);
        if(x % 2 == 0 && x % 7 != 0){
            kr2++;
            ans += kr7 + kr14;
        }
        if(x % 7 == 0 && x % 2 != 0){
            kr7++;
            ans += kr2 + kr14;
        }
        if(x % 14 == 0){
            kr14++;
            ans += i;
        }
        if(x % 2 != 0 && x % 7 != 0) ans += kr14;
    }
    printf("%d", ans);
    return 0;
}