【Codeforces Round #451 (Div. 2) A】Rounding

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【题意】

在这里输入题意

【题解】

模拟

【代码】

/*
  	1.Shoud it use long long ?
  	2.Have you ever test several sample(at least therr) yourself?
  	3.Can you promise that the solution is right? At least,the main ideal
  	4.use the puts("") or putchar() or printf and such things?
  	5.init the used array or any value?
  	6.use error MAX_VALUE?
  	7.use scanf instead of cin/cout?
  	8.whatch out the detail input require
*/
#include <bits/stdc++.h>
using namespace std;

int n;

int main(){
	#ifdef LOCAL_DEFINE
	    freopen("rush_in.txt", "r", stdin);
	#endif
	ios::sync_with_stdio(0),cin.tie(0);
    cin >> n;
    int x = n%10;
    if (x < 5){
        n = n-x;
    }else{
        n = n-x + 10;
    }
    cout << n << endl;
	return 0;
}