#include <stdio.h>
 
char upperCase (char c)
{
    if (c >= 'a' && c <= 'z') {
        c = c - 'a' + 'A';
    }
    return c;
}
 
int main (void) 
{
    char c;
    printf("input:");
    scanf("%c", &c);      
    c = upperCase(c);   
    printf("output:%c", c);

    return 0;
}