Submission #1147515

#	Time	Username	Problem	Language	Result	Execution time	Memory
1147515		iah	The Big Prize (IOI17_prize)	C++20	20 / 100	23 ms	408 KiB

prize

#include "prize.h"
#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define pii pair < int , int >
#define fi first
#define se second
#define FOR(i, a, b) for (int i = (a), _b = (b); i <= _b; i ++)
#define FORD(i, a, b) for (int i = (a), _b = (b); i >= _b; i --)
#define REP(i, n) for (int i = 0, _n = (n); i < _n; i ++)
#define bit(x, i) (((x) >> (i)) & 1ll)
#define mask(x) (1ll << (x))
#define mem(f, x) memset(f, x, sizeof(f))
#define sz(x) (int32_t) (x.size())

int find_best(int n) {
  auto tmp = ask(0);
  if (!tmp[1]) {
    return 0;
  }
	int pos = 0, cntl = tmp[0], cntr = tmp[1];
	while (true) {
    int l = pos + 1, r = n - 1, svl, svr;
    while (l <= r) {
      int mid = (l + r) >> 1;
      auto tmp = ask(mid);

      if (tmp[0] != cntl || tmp[1] != cntr) {
        pos = mid;
        svl = tmp[0];
        svr = tmp[1];
        r = mid - 1;
      }
      else {
        l = mid + 1;
      }
    }


    if (!svl && !svr) {
      return pos;
    }
    cntl = svl;
    cntr = svr;
	}
}

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