제출 #897487

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
897487		mihtriii295	Telefoni (COCI17_telefoni)	C++17	80 / 80	13 ms	2208 KiB

telefoni

#include<bits/stdc++.h>
#pragma GCC optimize("O2")
#define ll  long long
#define TIME (1.0 * clock() / CLOCKS_PER_SEC)
#define el  cout << '\n' 

using namespace std;

const ll N = 3e5 + 1;
const ll logN = 20;
const ll MOD = 1e9 + 7;

int n, a[N], res, d;
int main(){
    if(fopen("coci1617_r6_telefoni.inp", "r")){
        freopen("coci1617_r6_telefoni.inp", "r", stdin);
        freopen("coci1617_r6_telefoni.out", "w", stdout);
    }
    ios_base::sync_with_stdio(0); cin.tie(NULL);
    cout.tie(NULL);
    cin >> n >> d;
    for (int i = 1; i <= n; ++i)
        cin >> a[i];
    int st = 1;
    for (int i = 2; i <= n; ++i){
        if (a[i] == 1){
            if (i - st > d){
                // cout << st << ' ' << i; el;
                res += (i - st - 1) / d;
            }
            st = i;
        }
    }
    cout << res;
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

telefoni.cpp: In function 'int main()':
telefoni.cpp:16:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |         freopen("coci1617_r6_telefoni.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
telefoni.cpp:17:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |         freopen("coci1617_r6_telefoni.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• 서브태스크 1: 80 / 80