Submission #1062313

#	Time	Username	Problem	Language	Result	Execution time	Memory
1062313		ArthuroWich	The Big Prize (IOI17_prize)	C++17	20 / 100	38 ms	600 KiB

prize

#include"prize.h"
#include<bits/stdc++.h>
using namespace std;
int ans = -1;
bool check(vector<int> res) {
	return (res[0] == res[1] && res[0] == 0);
}
void calc(int l, int r) {
	if (l == r || ans != -1) {
		return;
	}
	int m = (l+r)/2;
	vector<int> seg1l, seg1r, seg2l, seg2r;
	seg1l = ask(l);
	seg1r = ask(m);
	seg2l = ask(m+1);
	seg2r = ask(r);
	if (check(seg1l)) {
		ans = l;
	}
	if (check(seg1r)) {
		ans = m;
	}
	if (check(seg2l)) {
		ans = m+1;
	}
	if (check(seg2r)) {
		ans = r;
	}
	if (seg1l != seg1r) {
		calc(l, m);
	}
	if (seg2l != seg2r) {
		calc(m+1, r);
	}
}
int find_best(int n) {
	calc(0, n-1);
	return ans;
}

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