#include <stdio.h>

int main()
{
    int grades[5];
    printf("input 5 grades:\n");
    for (int i = 0; i < 5; i++)
    {
        printf("num %d: ", i);
        scanf("%d", &grades[i]);
    }

    int total = 0;
    for (int i = 0; i < 5; i++)
    {
        total += grades[i];
    }

    printf("total grades: %d", total);
}