Submission #430456

#	Time	Username	Problem	Language	Result	Execution time	Memory
430456		Popax21	The Big Prize (IOI17_prize)	C++17	20 / 100	1 ms	404 KiB

prize

#include <assert.h>
#include "prize.h"

std::pair<int, int> query(int p) {
	std::vector<int> r = ask(p);
	return std::make_pair(r[0], r[1]);
}

int binsearch(int l, int r) {
	assert(l < r);
	if(l == r-1) return l;

	int m = l + (r-l) / 2;
	auto[lc, rc] = query(m);
	if(lc == 0 && rc == 0) return m;

	if(lc != 0) return binsearch(l, m);
	else if(rc != 0) return binsearch(m+1, r);
	else assert(false);
}

int find_best(int n) {
	return binsearch(0, n);
}

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