大佬求调P11060 【MX-X4-T0】「Jason-1」x!

#include<iostream>
using namespace std;
int n,a;
long long m=1;
int main(){
    cin>>n;
    if(n=0){
        cout<<"Yes"<<endl;
        return 0;
    }
    for(int i=1;i<=n;i++){
        m*=i;
    }
    a=n+1;
    if(m%a==0){
        cout<<"Yes"<<endl;
    }
    else{
        cout<<"No"<<endl;
    }
    return 0;
}

woc难死了