제출 #346791

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
346791		arnold518	Trampoline (info1cup20_trampoline)	C++14	43 / 100	821 ms	43440 KiB

trampoline

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int MAXN = 2e5;

int R, C, N, Q;
pii A[MAXN+10];
map<int, vector<pii>> M;
int par[MAXN+10][30];

int main()
{
	scanf("%d%d%d", &R, &C, &N);
	for(int i=1; i<=N; i++)
	{
		scanf("%d%d", &A[i].first, &A[i].second);
		M[A[i].first].push_back({A[i].second, i});
	}

	for(auto &it : M)
	{
		sort(it.second.begin(), it.second.end());
	}

	for(int i=1; i<=N; i++)
	{
		auto it=lower_bound(M[A[i].first+1].begin(), M[A[i].first+1].end(), pii(A[i].second, 0));
		if(it==M[A[i].first+1].end()) par[i][0]=0;
		else par[i][0]=it->second;
	}

	A[0]={987654321, 987654321};
	for(int i=1; i<=20; i++) for(int j=1; j<=N; j++) par[j][i]=par[par[j][i-1]][i-1];

	scanf("%d", &Q);
	while(Q--)
	{
		int y1, x1, y2, x2;
		scanf("%d%d%d%d", &y1, &x1, &y2, &x2);
		if(y1==y2 && x1<=x2)
		{
			printf("Yes\n");
			continue;
		}

		auto it=lower_bound(M[y1].begin(), M[y1].end(), pii(x1, 0));
		if(it==M[y1].end())
		{
			printf("No\n");
			continue;
		}
		int now=it->second;
		for(int i=20; i>=0; i--)
		{
			if(A[par[now][i]].first<y2) now=par[now][i];
		}

		if(A[now].first!=y2-1)
		{
			printf("No\n");
			continue;
		}

		if(A[now].second<=x2)
		{
			printf("Yes\n");
		}
		else
		{
			printf("No\n");
		}
	}
}

컴파일 시 표준 에러 (stderr) 메시지

trampoline.cpp: In function 'int main()':
trampoline.cpp:17:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   17 |  scanf("%d%d%d", &R, &C, &N);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~~
trampoline.cpp:20:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   20 |   scanf("%d%d", &A[i].first, &A[i].second);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
trampoline.cpp:39:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   39 |  scanf("%d", &Q);
      |  ~~~~~^~~~~~~~~~
trampoline.cpp:43:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   43 |   scanf("%d%d%d%d", &y1, &x1, &y2, &x2);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• 서브태스크 1: 23 / 23
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