austin2010 2023-07-14 15:02:20 4 返回题目
#include <bits/stdc++.h>
#pragma G++ optimize(1)
#pragma G++ optimize(2)
#pragma G++ optimize(3,"Ofast","inline")
using namespace std;
int main(void)
{
float a; scanf("%f",&a); printf("%.3f",a); return 0;
}
