oj.uz

Submission #346797

# Submission time Handle Problem Language Result Execution time Memory
346797 2021-01-11T05:28:53 Z arnold518 Trampoline (info1cup20_trampoline) C++14
43 / 100
 553 ms 34320 KB 
#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];
unordered_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++)
	{
		if(M.find(A[i].first+1)==M.end()) continue;
		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;
		if(par[i][0]!=0) assert(A[par[i][0]].first==A[i].first+1);
	}

	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(x1>x2 || y1>y2)
		{
			printf("No\n");
			continue;
		}
		if(y1==y2 && x1<=x2)
		{
			printf("Yes\n");
			continue;
		}

		if(M.find(y1)==M.end())
		{
			printf("No\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;
		/*
		while(1)
		{
			if(A[par[now][0]].first>=y2) break;
			now=par[now][0];
		}
		*/

		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");
		}
	}
}

Compilation message

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:41:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   41 |  scanf("%d", &Q);
      |  ~~~~~^~~~~~~~~~
trampoline.cpp:45:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   45 |   scanf("%d%d%d%d", &y1, &x1, &y2, &x2);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 1516 KB 200 token(s): yes count is 21, no count is 179
2 Correct 6 ms 1772 KB 200 token(s): yes count is 70, no count is 130
3 Correct 4 ms 1388 KB 197 token(s): yes count is 25, no count is 172

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 199 ms 28396 KB 4000 token(s): yes count is 99, no count is 3901
2 Correct 172 ms 28652 KB 4000 token(s): yes count is 91, no count is 3909
3 Correct 169 ms 27756 KB 4000 token(s): yes count is 4000, no count is 0
4 Correct 183 ms 28396 KB 4000 token(s): yes count is 1991, no count is 2009

Subtask #3
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 373 ms 28256 KB expected YES, found NO [4th token]
2 Halted 0 ms 0 KB -

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Incorrect 7 ms 1004 KB expected YES, found NO [1st token]
2 Halted 0 ms 0 KB -

Subtask #5
0 / 27.0

# Verdict Execution time Memory Grader output
1 Incorrect 553 ms 34320 KB expected YES, found NO [1st token]
2 Halted 0 ms 0 KB -