11219 How old are you?

#include<stdio.h>

int main()
{
    int i, t, d1, d2, m1, m2, y1, y2, fy;
    scanf("%d", &t);
    for(i=1; i<=t; i++){
        scanf("%d/%d/%d", &d1, &m1, &y1);
        scanf("%d/%d/%d", &d2, &m2, &y2);

        fy = y1-y2;
        if(y1==y2 && m1<m2){
            printf("Case #%d: Invalid birth date\n",i);
        }
        else if(fy>130){
            printf("Case #%d: Check birth date\n",i);
        }
        else if(y1>y2 && m1>m2){
            printf("Case #%d: %d\n", i, fy);
        }
        else if(y1>y2 && m1==m2){
            printf("Case #%d: 0\n", i);
        }
    }
    return 0;
}