Submission #132660

#	Time	Username	Problem	Language	Result	Execution time	Memory
132660		Talant	The Big Prize (IOI17_prize)	C++17	0 / 100	88 ms	508 KiB

prize

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

#define sc second
#define fr first
#define mk make_pair
#define pb push_back

using namespace std;

const int N = (1e6 + 5);
const int inf = (1e9 + 7);

int find_best(int n) {
      int cur = 0;
      int cn = 0;

      while (1) {
            int l = cur,r = n - 1;

            vector<int> res = ask(cur);
            int lf = res[1];
            int rt = res[1];
            if (res[0] + res[1] == 0) return cur;

            while (r - l > 1)  {
                  int m = (r + l) >> 1;
                  res = ask(m);
                  if (res[0] + res[1] == 0) return m;

                  if (res[0] == lf && res[1] == rt) l = m;
                  else r = m;
            }
            res = ask(r);
            if (res[0] + res[1] == 0) return r;

            if (res[0] == lf && res[1] == rt) l = r;

            cur = l + 1;
            if (cur > n - 1) break;
      }
}

Compilation message (stderr)

prize.cpp: In function 'int find_best(int)':
prize.cpp:16:11: warning: unused variable 'cn' [-Wunused-variable]
       int cn = 0;
           ^~
prize.cpp:42:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

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