编辑代码

#include<stdio.h>    
int main() {    
    int year=0, day=0, yearrun=0;    
    scanf("%d", &year);    
    for (int i = 1900; i <= year; i++) {    
        if (i%400==0||((i %4==0)&&(i%100!=0))){    
        yearrun += 1;    
        }    
    }    
    day =( (year - 1899) * 365 + yearrun - 245)%7;    
    printf("%d\n", 14 - day);    
}