#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
int main()
{
    int n = 0;
    scanf("%d", &n);
    if (n % 2 == 0)
        printf("2 ");
    if (n % 3 == 0)
        printf("3 ");
    if (n % 7 == 0)
        printf("7");
    if (n % 2 != 0 && n % 3 != 0 && n % 7 != 0)
        printf("n");
    return 0;
}



#include <stdio.h>
int main()
{
    int count = 0;
    int n = 0;
    while (~scanf("%d", &n))
    {
        if (n > 0)
            count++;
    }
    printf("positive:%d\nnegative:%d\n", count, 10 - count);
    return 0;
}



#include <stdio.h>
int main()
{
    float val, money;
    int m, d, c;
    scanf("%f %d %d %d", &val, &m, &d, &c);
    if (m == 12 && d == 12)
        money = val * 0.8 - c * 50;
    else if (m == 11 && d == 11)
        money = val * 0.7 - c * 50;
    else
        money = val - c * 50;
    if (money > 0)
        printf("%.2f", money);
    else
        printf("0.00");
    return 0;
}


#include <stdio.h>
int main()
{
    float kg;
    char c;
    int count = 0;
    scanf("%f %c", &kg, &c);
    while (--kg > 0)
        count++;
    if (c == 'y')
        printf("%d", 25 + count);
    else
        printf("%d", 20 + count);
    return 0;
}


#include <stdio.h>
int main()
{
    float n = 0;
    scanf("%f", &n);
    if (n < 100)
        printf("%.1f", n);
    else if (n >= 100 && n < 500)
        printf("%.1f", n * 0.9);
    else if (n >= 500 && n < 2000)
        printf("%.1f", n * 0.8);
    else if (n >= 2000 && n < 5000)
        printf("%.1f", n * 0.7);
    else if (n >= 5000)
        printf("%.1f", n * 0.6);
    return 0;
}

#include <stdio.h>
int main()
{
    int n = 0;
    scanf("%d", &n);
    if (n <= 10)
        printf("w");
    else
        printf("v");
    return 0;
}