PAT 天梯赛 L1-029. 是不是太胖了 【水】

题目链接

https://www.patest.cn/contests/gplt/L1-029

AC代码

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
using namespace std;

typedef long long LL;
const double PI = 3.14159265358979323846264338327;
const double E = 2.718281828459;
const double eps = 1e-6;
const int MAXN = 0x3f3f3f3f;
const int MINN = 0xc0c0c0c0;
const int maxn = 1e5 + 5;
const int MOD = 1e9 + 7;

int main()
{
    int n;
    cin >> n;
    printf("%.1lf\n", (n - 100) * 0.9 * 2);
}