Submission #103901

#	Time	Username	Problem	Language	Result	Execution time	Memory
103901		turbat	The Big Prize (IOI17_prize)	C++14	0 / 100	62 ms	384 KiB

prize

#include "prize.h"
#include <bits/stdc++.h>
using namespace std;
using vi = vector <int>;
using pii = pair <int, int>;
#define pb push_back
#define mp make_pairdefine F first
#define S second
#define N 200005
int mx;
int gg(int l, int r){
	vi tmp, tmp1;
	if (l == r) {
		tmp = ask(l); 
		if (tmp[0] + tmp[1] == 0) return l;
		return -1;
	}
	while (l <= r){
		tmp = ask(l);
		if (tmp[0] + tmp[1] == 0) return l;
		if (tmp[0] + tmp[1] == mx) break;
		l++;
	}
	while(l <= r){
		tmp1 = ask(r);
		if (tmp1[0] + tmp1[1] == 0) return r;
		if (tmp1[0] + tmp1[1] == mx) break;
		r--;
	}
	if (l > r) return -1;
	if (tmp1[0] == tmp[0]) return -1;
	if (l == r) return gg(l, r);
	int mid = (l + r) / 2;
	return max(gg(l, mid), gg(mid + 1, r));
}
int find_best(int n) {
	for (int i = 0;i < n;i++){
      	vi tmp = ask(i);
      	if (tmp[0] + tmp[1] == 0) 
          return i;
    }
}

Compilation message (stderr)

prize.cpp: In function 'int find_best(int)':
prize.cpp:42:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

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