Submission #581974

#	Time	Username	Problem	Language	Result	Execution time	Memory
581974		alirezasamimi100	The Big Prize (IOI17_prize)	C++17	20 / 100	91 ms	300 KiB

prize

#include "prize.h"
#include <bits/stdc++.h>

#define pb push_back

using namespace std;

mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

int ans = -1, cnt = 0, mx = 0;

vector<int> doask(int i){
    vector<int> v = ask(i);
    if(v[0] == 0 && v[1] == 0) ans = i;
    return v;
}

void solve(int l, int r){
    if(ans != -1) return;
    int g = 0;
    vector<int> u;
    while(r > l){
        u = doask(r - 1);
        r--;
        if(u[0] + u[1] == mx) break;
        g++;
    }
    if(r == l) return;
    int m = (l + r) >> 1, t = 0, rm = m;
    vector<int> v;
    while(m < r){
        v = doask(m);
        if(v[0] + v[1] == mx) break;
        t++;
        m++;
    }
    if(v[0] > cnt + t) solve(l, rm);
    cnt += t;
    if(m + 1 < r && v[1] - u[1] > 0) solve(m + 1, r);
    cnt += g;
}
int find_best(int n) {
    for(int i = 0; i < min(n, 700); i++){
        vector<int> v = doask(i);
        if(v[0] + v[1] > mx) mx = v[0] + v[1];
    }
    solve(0, n);
    return ans;
}

• Subtask 1: 20 / 20
• Subtask 2: 0 / 80