[UVa] 621 - Secret Research

After getting used to so many critical problems in UVa, you simply can't take this so simply while it is one of the silliest problems. Even the exception condition doesn't really needs a care.

#include "stdio.h"

int main() {

    int n, len;
    char in[10010];

    scanf("%d",&n);

    while(n--) {
        scanf("%s",in);
        if (!strcmp(in,"1") || !strcmp(in,"4") || !strcmp(in,"78"))
            printf("+");
        else {
            len=strlen(in);
            if (in[len-2]=='3' && in[len-1]=='5') printf("-");
            else if (in[0]=='9' && in[len-1]=='4') printf("*");
            else if (in[0]=='1' && in[1]=='9' && in[2]=='0') printf("?");
        }
        printf("\n");
    }

    return 0;

}