циклы

// 1
#include <iostream>
#include <cstdlib>

using namespace std;

int main() {
    int number, sum = 0;
    for (int i = 0; i < 10; i++) {
        cin >> number;
        if ((number > 0) && ((number % 10 == 5) || (number % 10 == 8))) { sum++; }
    }
    cout << sum << endl;
}

// 2
#include <iostream>
#include <cstdlib>

using namespace std;

int main() {
    int number, sumofpositive = 0, sumofnegative = 0;
    for (int i = 0; i < 10; i++) {
        cin >> number;
        if (number > 0) { sumofpositive++; }
        else if (number < 0) { sumofnegative ++; }
    }
    cout << "sum of negative numbers= " << sumofnegative << endl;
    cout << "sum of positive numbers= " << sumofpositive << endl;
}