#include<bits/stdc++.h>
#define ll long long;
#define jiasu ios::sync_with_stdio(0);cin.tie(0);
using namespace std;
int main(){
	double a;
	cin>>a;
	cout<<(ll)a;
	return 0;
}

敢问dalao们这里哪错了？？？

报错expected primary-expression before 'long'