제출 #896034

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
896034		wilsp	Lightning Rod (NOI18_lightningrod)	C++17	0 / 100	1 ms	728 KiB

Main

#include <iostream>
#include <vector>
using namespace std;
//aouxwoux's submission for Mock ZCO#1 Q1

int main()
{
	freopen("lightningrod.in","r",stdin);
	freopen("lightningrod.out","w",stdout);

	vector<pair<int,int>> coords;

	int n;

	cin >> n;

	for(int i = 0; i<n; i++)
	{
		int x,y;
		cin >> x >> y;
		coords.push_back({x,y});
	}

	if(n==1)
	{
		cout << "1" << endl;
	}
	else
	{
		if(coords.size() > 2)
		{
			cout << n;
		}
		else
		{
			cout << "2";
		}
	}

	

	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

lightningrod.cpp: In function 'int main()':
lightningrod.cpp:8:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    8 |  freopen("lightningrod.in","r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
lightningrod.cpp:9:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 |  freopen("lightningrod.out","w",stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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