View Code of Problem 28

    #include <stdio.h>
    #include <stdlib.h>
    #include <math.h>
    int main(){
        
        int year = 0;
        while(scanf("%d",&year)!=EOF){
     
           if((year%4 == 0 && year%100!=0) || (year%400 == 0)){
               printf("%s","Leap Year\n");
           }else{
               printf("%s","Not Leap Year\n");
           }
        }
        return 0;
    }