Submission #959276

#	Time	Username	Problem	Language	Result	Execution time	Memory
959276		MilosMilutinovic	Trampoline (info1cup20_trampoline)	C++14	100 / 100	595 ms	58072 KiB

trampoline

#include<bits/stdc++.h>
 
#define pb push_back
#define fi first
#define se second
#define mp make_pair
 
using namespace std;
 
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef long double ld;
 
template <typename T> bool chkmin(T &x,T y){return x>y?x=y,1:0;}
template <typename T> bool chkmax(T &x,T y){return x<y?x=y,1:0;}
 
ll readint(){
	ll x=0,f=1; char ch=getchar();
	while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}
	while(ch>='0'&&ch<='9'){x=x*10+ch-'0';ch=getchar();}
	return x*f;
}

int r,c,n,q;
int x[200005],y[200005],nxt[200005][20];
map<int,set<pii>> v;

int main(){
	r=readint(); c=readint(); n=readint();
	for(int i=1;i<=n;i++){
		x[i]=readint(); y[i]=readint();
		v[x[i]].emplace(y[i],i);
	}
	for(int i=1;i<=n;i++){
		auto it=v[x[i]+1].lower_bound(mp(y[i],-1));
		if(it==v[x[i]+1].end()) nxt[i][0]=0;
		else nxt[i][0]=it->se;
	}
	for(int j=1;j<20;j++){
		for(int i=1;i<=n;i++){
			nxt[i][j]=nxt[nxt[i][j-1]][j-1];
		}
	}
	q=readint();
	while(q--){
		int x1=readint(),y1=readint(),x2=readint(),y2=readint();
		if(x1>x2||y1>y2){
			printf("No\n");
			continue;
		}
		if(x1==x2){
			printf("Yes\n");
			continue;
		}
		auto it=v[x1].lower_bound(mp(y1,-1));
		if(it==v[x1].end()){
			printf("No\n");
			continue;
		}
		int idx=it->se;
		for(int i=19;i>=0;i--){
			if(((x2-x1-1)>>i)&1) idx=nxt[idx][i];
		}
		if(idx!=0&&y[idx]<=y2) printf("Yes\n");
		else printf("No\n");
	}
	return 0;
}

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