Submission #1028414

#	Time	Username	Problem	Language	Result	Execution time	Memory
1028414		vjudge1	Trampoline (info1cup20_trampoline)	C++17	11 / 100	268 ms	77856 KiB

trampoline

#include<bits/stdc++.h>
using namespace std;
#define lalala ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
#define ll long long
#define int long long int
#define endl '\n'
#define N 200100
#define M 30
#define big 2147483647 
#define bigg 9223372036854775807 
#define pb push_back
#define p push
#define ins insert
#define f first
#define s second

int lca[N][M];
vector<int> adj[N], comprez;
vector<pair<int,int>> ikinci;
int gittik[N];
void dfs(int x,int a,int b){
	if(gittik[x])return ;
	gittik[x]=1;
	lca[x][0]=x;
	pair<int,int> pa={a+1,b};
	int yeni=(lower_bound(ikinci.begin(),ikinci.end(),pa)-ikinci.begin());
	
	if(yeni!=ikinci.size()&&ikinci[yeni].f==a+1&&gittik[yeni]==0){
		lca[x][0]=yeni;
		dfs(yeni,a+1,ikinci[yeni].s);
		return;
	}
}
void doldur(){
	for(int i=1;i<M;i++){
		for(int j=0;j<ikinci.size();j++){
			lca[j][i]=lca[lca[j][i-1]][i-1];
		}
	}
}
int qua(int x,int y,int a,int b){
	a--;

	pair<int,int> pa={x,y};
	int node=lower_bound(ikinci.begin(),ikinci.end(),pa)-ikinci.begin();
	if(node==ikinci.size()||ikinci[node].f!=x) return 0;

	int fark=a-x;

	for(int i=0;i<M;i++){
		if((fark&(1<<i))){
			node=lca[node][i];
		}
	}
	x=ikinci[node].f, y=ikinci[node].s;

	if(x==a&&y<=b)return 1;
	return 0;
}

signed main(){
	lalala;
	int r,c,n;cin>>r>>c>>n;
	vector<pair<int,int>> v;
	vector<int> yedek;
	for(int i=0;i<n;i++){
		int a,b;cin>>a>>b;
		v.pb({b,a});
		yedek.pb(a);
		ikinci.pb({a,b});
	}
	sort(v.begin(),v.end());
	sort(yedek.begin(),yedek.end());
	sort(ikinci.begin(),ikinci.end());
	comprez.pb(yedek[0]);
	for(int i=1;i<n;i++){
		if(yedek[i]!=yedek[i-1])comprez.pb(yedek[i]);
	}

	for(auto u:v){
		int yer=u.s;
		int kim=lower_bound(comprez.begin(),comprez.end(),yer)-comprez.begin();
		adj[kim].pb(u.f);
	}
	for(int i=0;i<(int)ikinci.size();i++){
		if(gittik[i])continue;
		dfs(i,ikinci[i].f,ikinci[i].s);
	}
	doldur();
	int q;cin>>q;
	while(q--){
		int x,y,a,b;cin>>x>>y>>a>>b;
		if(x>a||y>b){
			cout<<"No"<<endl;
			continue;
		}
		if(x==a){
			cout<<"Yes"<<endl;
			continue;
		}
		int ok=qua(x,y,a,b);
		if(ok)cout<<"Yes"<<endl;
		else cout<<"No"<<endl;
	}
	
}

Compilation message (stderr)

trampoline.cpp: In function 'void dfs(long long int, long long int, long long int)':
trampoline.cpp:28:9: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |  if(yeni!=ikinci.size()&&ikinci[yeni].f==a+1&&gittik[yeni]==0){
      |     ~~~~^~~~~~~~~~~~~~~
trampoline.cpp: In function 'void doldur()':
trampoline.cpp:36:16: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |   for(int j=0;j<ikinci.size();j++){
      |               ~^~~~~~~~~~~~~~
trampoline.cpp: In function 'long long int qua(long long int, long long int, long long int, long long int)':
trampoline.cpp:46:9: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |  if(node==ikinci.size()||ikinci[node].f!=x) return 0;
      |     ~~~~^~~~~~~~~~~~~~~

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