Submission #992307

#	Time	Username	Problem	Language	Result	Execution time	Memory
992307		ramalzaher	Trampoline (info1cup20_trampoline)	C++14	54 / 100	2072 ms	78064 KiB

trampoline

#include <bits/stdc++.h>
#define ll long long  
#define sz size()
#define pb push_back
#define all(x) x.begin() , x.end()
using namespace std;
const int N = 2505 ; 
int r , c , n ; 
map<pair<int,int> , int > mp ;  
bool check(vector<int> &a){
	for (int i = 0; i < a.size()-1 ; i++)
	{
		if(a[i] > a[i+1] ) return 0  ; 
	}
	
	return 1 ;
	}
bool bfs(int xx , int yy , int endx , int endy  ){
	queue<pair<int,int> > q ; 
	q.push({xx , yy}) ;
while (q.size())
{
	auto &[x,y]  = q.front() ;
	q.pop() ; 
	if(x == endx && y <= endy ) {return 1 ;}
	if(mp[{x,y}]){
		if(x+1 <= r ){  
		q.push({x+1 , y}) ;
		}
		}
		else {
		if(y+1 <= c ) {
		q.push({x , y + 1 });	
			}
		}
	}
	return 0 ; 		
}


int main()
{
	cin >> r >> c >> n ;
	if(r <= 2555 && c <= 2555 ){
	for (int i = 0; i < n; i++)
	{
		int a, b ; cin >> a >> b; 
		mp[{a,b}]=1;
	}
	int t ; cin >> t; 
	for (int i = 0; i < t; i++)
	{
		int sx , sy  , ex , ey ; cin >> sx >> sy >> ex >> ey; 		
		bool ok = bfs(sx , sy , ex, ey) ;
		if(ok)cout<<"Yes\n" ;	else cout<<"No\n";  
	}}else {	map<int,set<int>>mp; 

	for (int i = 0; i < n; i++)
	{
		int a, b ; cin >> a >> b; 
		mp[a].insert(b) ; 
	}
	int t ; cin >> t; 
	for (int i = 0; i < t; i++)
	{
		vector<int> v ; bool ok= 0 ; 
		int sx , sy  , ex , ey ; cin >> sx >> sy >> ex >> ey; 
		v.pb(sy);
		for(int j = sx ; j < ex ; j ++ ){
			auto itt = mp[j].lower_bound(sy) ; 
			if(itt==mp[j].end()) { v.pb(-1);ok=1; break ; }
			v.pb(*itt) ; 
			sy = *itt ; 
			//cout<<sy<<" " ; 
			}
			v.pb(ey);
			//for(auto it : v)cout<<it<<" ";//cout<<endl; 
			if(check(v)&&ok==0)cout<<"Yes\n"; else cout<<"No\n"; 
	}}
	


  return 0;
}
/*
  4 4 3
  1 1 
  2 1 
  3 4 
  1
  1 1 4 3 
 * 
 *  
 * 
 * */

Compilation message (stderr)

trampoline.cpp: In function 'bool check(std::vector<int>&)':
trampoline.cpp:11:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 |  for (int i = 0; i < a.size()-1 ; i++)
      |                  ~~^~~~~~~~~~~~
trampoline.cpp: In function 'bool bfs(int, int, int, int)':
trampoline.cpp:23:8: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   23 |  auto &[x,y]  = q.front() ;
      |        ^

• Subtask 1: 23 / 23
• Subtask 2: 20 / 20
• Subtask 3: 11 / 11
• Subtask 4: 0 / 19
• Subtask 5: 0 / 27