Submission #298045

#	Time	Username	Problem	Language	Result	Execution time	Memory
298045		Batyr	The Big Prize (IOI17_prize)	C++17	90 / 100	97 ms	2816 KiB

prize

#include <bits/stdc++.h>
#include "prize.h"
using namespace std;
#define pb push_back
#define ss second
#define ff first
#define pii pair<int,int>

const int maxn=2e5+5;
int dp[maxn][3],ans;
bool tr;

void f(int l,int r){
	if(dp[l][0] == -1 and dp[l][1]==-1){
		vector<int> p = ask(l);
		dp[l][0]=p[0];
		dp[l][1]=p[1];
	}
	if(dp[l][0]+dp[l][1]==0){
		ans=l,tr=1;
		return;
	}
	if(dp[r][0]==-1 and dp[r][1]==-1){
		vector<int> p = ask(r);
		dp[r][0] = p[0];
		dp[r][1] = p[1];
	}
	
	if(dp[r][0]+dp[r][1]==0){
		ans = r,tr=1;
		return;
	}
	
	if(dp[l][0]+dp[l][1] == dp[r][0]+dp[r][1] and dp[r][0]-dp[l][0]==0) return;
	if(r-l+1 <= 2) return;	
	f(l,(l+r)/2);
	if(tr) return;	
	f((l+r)/2+1,r);
	if(tr) return;
}

int find_best(int n){
	memset(dp,-1,sizeof(dp));
	f(0,n-1);
	return ans;
}

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