제출 #743167

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
743167		Azther0z	Bitaro’s Party (JOI18_bitaro)	C++11	7 / 100	2080 ms	9968 KiB

bitaro

#include <bits/stdc++.h>
using namespace std;
vector<vector<int>> adjl(100001);
bitset<100001> visited,busy;
int result;
void dijkstra(int start)
{
	priority_queue<pair<int,int>> pq;
	vector<int> dist(100001,0);
	pq.push({0,start});
	while(!pq.empty())
	{
		int d=pq.top().first,current=pq.top().second;
		pq.pop();
		if(d!=dist[current])
			continue;
		if(!busy[current])
			result=max(result,d);
		for(auto next:adjl[current])
			if(d+1>dist[next])
			{
				dist[next]=d+1;
				pq.push({dist[next],next});
			}
	}
}
int main()
{
	int n,m,q;
	scanf("%d%d%d",&n,&m,&q);
	while(m--)
	{
		int a,b;
		scanf("%d%d",&a,&b);
		adjl[b].push_back(a);
	}
	while(q--)
	{
		int a,b,c;
		scanf("%d%d",&a,&b);
		visited=busy=0;
		while(b--)
		{
			scanf("%d",&c);
			busy[c]=true;
		}
		result=-1;
		dijkstra(a);
		printf("%d\n",result);
	}
}

컴파일 시 표준 에러 (stderr) 메시지

bitaro.cpp: In function 'int main()':
bitaro.cpp:30:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |  scanf("%d%d%d",&n,&m,&q);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~
bitaro.cpp:34:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   34 |   scanf("%d%d",&a,&b);
      |   ~~~~~^~~~~~~~~~~~~~
bitaro.cpp:40:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |   scanf("%d%d",&a,&b);
      |   ~~~~~^~~~~~~~~~~~~~
bitaro.cpp:44:9: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   44 |    scanf("%d",&c);
      |    ~~~~~^~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 0 / 7
• Subtask 3: 0 / 86