Submission #407474

#	Time	Username	Problem	Language	Result	Execution time	Memory
407474		Kevin_Zhang_TW	The Big Prize (IOI17_prize)	C++17	20 / 100	1 ms	288 KiB

prize

#include "prize.h"

int find_best(int n) {
	int l = 0, r = n-1, m;
	while (l < r) {
		m = l + r >> 1;
		auto vec = ask(m+1);
		if (vec[0] == 0 && vec[1] == 0)
			return m+1;
		if (vec[0])
			r = m;
		else
			l = m+1;
	}
	return l;
}

Compilation message (stderr)

prize.cpp: In function 'int find_best(int)':
prize.cpp:6:9: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
    6 |   m = l + r >> 1;
      |       ~~^~~

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