Submission #718158

#	Time	Username	Problem	Language	Result	Execution time	Memory
718158		Jarif_Rahman	The Big Prize (IOI17_prize)	C++17	90 / 100	85 ms	5320 KiB

prize

#include "prize.h"
#include <bits/stdc++.h>
#define pb push_back
#define f first
#define sc second
using namespace std;
typedef long long int ll;
typedef string str;

vector<int> asked[200000];
vector<int> Ask(int i){
    if(asked[i].empty()) asked[i] = ask(i);
    return asked[i];
}

int find_best(int n){
    int p = 0;
    int mx = 0;
    for(int i = 0; i < min(n, 480); i++){
        auto v = Ask(i);
        mx = max(mx, v[0]+v[1]);
    }
    while(1){
        auto cur = Ask(p);
        if(cur[0]+cur[1] == 0) return p;
        if(cur[0]+cur[1] != mx){
            p++;
            continue;
        }
        int a = p+1, b = n-1;
        while(a < b){
            int md = (a+b)/2;
            auto v = Ask(md);
            if(v[0]+v[1] != cur[0]+cur[1]) b = md;
            else if(v[0] != cur[0]) b = md-1;
            else a = md+1;
        }
        p = a;
    }
}

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