#include <stdio.h>

int isLeapYear(int y){
    if(y%400==0) return 1;
    if(y%100==0) return 0;
    if(y%4==0) return 1;
    return 0;
}
int main(){
    int y;
    printf("西暦を入力してください\n");scanf("%d",&y);
    if(isLeapYear(y)) printf("この年は閏年です");
    else printf("この年は閏年ではありません");
}

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