Submission #132707

#	Time	Username	Problem	Language	Result	Execution time	Memory
132707		Talant	The Big Prize (IOI17_prize)	C++17	90 / 100	103 ms	504 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);

vector <int> res;
int mx,cur;

int find_best(int n) {
      for (int i = 0; i < min(n,500); i ++) {
            res = ask(i);
            int s = res[0] + res[1];
            if (!s) return i;
            if (s >= mx) mx = s,cur = i;
      }
      while(1) {
            res = ask(cur);
            if (res[0] + res[1] == 0) return cur;
            if (res[0] + res[1] != mx) {
                  cur ++;
                  continue;
            }
            int lf = res[0];
            int rt = res[1];
            int l = cur,r = n - 1;
            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;
      }
}

• Subtask 1: 20 / 20
• Subtask 2: 70 / 80