Submission #1029230

#	Time	Username	Problem	Language	Result	Execution time	Memory
1029230		amirhoseinfar1385	The Big Prize (IOI17_prize)	C++17	90 / 100	193 ms	1492 KiB

prize

#include "prize.h"
#include<bits/stdc++.h>
using namespace std;
map<int,pair<int,int>>mp;
int cnta=0;

pair<int,int>pors(int u){
	if(mp.count(u)==0){
		cnta++;
		if(cnta>=10000){
			exit(23);
		}
		vector<int>hey=ask(u);
		mp[u]=make_pair(hey[0],hey[1]);
	}
	return mp[u];
}
 
int find_best(int n) {
	mp.clear();
	int cnta=0;
	int wtf=-1;
	for(int i=0;i<n;){
		//cout<<i<<endl;
		pair<int,int>av=pors(i);
		if(av.first+av.second==0){
			return i;
		}
		cnta++;
		pair<int,int>fake;
		if(wtf!=-1){
			fake=pors(wtf);
			if(av.first+av.second<=fake.first+fake.second){
				i++;
				continue;
			}
		}
		int low=i,high=n,mid,f=0;
		for(auto x:mp){
			mid=x.first;
			fake=pors(mid);
			if(fake.first+fake.second!=av.first+av.second){
				if(fake.first+fake.second>av.first+av.second){
					f=1;
					break;
				}
				high=mid;
			}else{
				if(fake.first-av.first==0){
					low=mid;
					high=n;
				}else{
					high=mid;
				}
			}
		}
		if(f){
			wtf=i;
			i=low+1;
			continue;
		}
		low=max(low,i);
		while(high-low>1){
			mid=(high+low)>>1;
			fake=pors(mid);
			if(fake.first+fake.second!=av.first+av.second){
				if(fake.first+fake.second>av.first+av.second){
					wtf=i;
					break;
				}
				high=mid;
			}else{
				if(fake.first-av.first==0){
					low=mid;
				}else{
					high=mid;
				}
			}
		}
		i=low+1;
	}
	return 0;
}

• Subtask 1: 20 / 20
• Subtask 2: 70 / 80