#include <stdio.h>

#define N 5

int main(void) {
    int nominaly[N] = { 20, 10, 5, 2, 1 };
    int kwota = 0;

    printf("Podaj sume pieniedzy: ");
    scanf("%d", &kwota);

    int i;
    for (i = 0; i < N; i++) {
        int n = nominaly[i];
        int r = kwota/n;
        if (r > 0) {
            printf("%d x %d\n", r, n);
        }
        kwota -= r*n;
    }

    return 0;
}