oj.uz

Submission #876718

# Submission time Handle Problem Language Result Execution time Memory
876718 2023-11-22T08:55:00 Z abczz The Big Prize (IOI17_prize) C++14
100 / 100
 25 ms 2416 KB 
#include "prize.h"
#include <iostream>
#include <vector>
#include <random>
#include <chrono>
#include <map>
#define ll long long
 
using namespace std;
 
ll f;
map <ll, vector<int> > mp;
vector <int> R;
vector <int> query(ll u) {
  if (mp.find(u) != mp.end()) return mp[u];
  else return mp[u] = ask(u);
}
void solve(ll l, ll r, ll ql, ll qr) {
	if (l > r || ql + qr == R[0] + R[1]) return;
	ll mid = (l+r)/2;
	for (int i=mid; i<=r; ++i) {
		auto u = query(i);
		if (!u[0] && !u[1]) {
			f = i;
			return;
		}
		else if (u[0]+u[1] == R[0]+R[1]) {
			solve(l, mid-1, ql, u[1]+(i-mid));
			if (f != -1) return;
			solve(i+1, r, u[0], qr);
			return;
		}
    else if (u[0]+u[1] > R[0]+R[1]) {
      R = u;
      f = 1e18;
      return;
    }
	}
	solve(l, mid-1, ql, qr+(r-mid+1));
}
 
int find_best(int n) {
  mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
  R = {-1, -1};
  for (int i=0; i<100; ++i) {
    ll id = rng() % n;
    auto u = query(id);
    if (!u[0] && !u[1]) return id;
    if (u[0]+u[1] > R[0]+R[1]) swap(u, R);
  }
  while (true) {
    f = -1;
    solve(0, n-1, 0, 0);
    if (f != 1e18) break;
  }
	return f;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 440 KB Output is correct
2 Correct 1 ms 444 KB Output is correct
3 Correct 1 ms 620 KB Output is correct
4 Correct 1 ms 440 KB Output is correct
5 Correct 1 ms 444 KB Output is correct
6 Correct 1 ms 444 KB Output is correct
7 Correct 1 ms 444 KB Output is correct
8 Correct 1 ms 444 KB Output is correct
9 Correct 1 ms 444 KB Output is correct
10 Correct 1 ms 440 KB Output is correct

Subtask #2
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 444 KB Output is correct
2 Correct 1 ms 444 KB Output is correct
3 Correct 1 ms 444 KB Output is correct
4 Correct 1 ms 444 KB Output is correct
5 Correct 1 ms 440 KB Output is correct
6 Correct 1 ms 444 KB Output is correct
7 Correct 1 ms 444 KB Output is correct
8 Correct 1 ms 688 KB Output is correct
9 Correct 1 ms 444 KB Output is correct
10 Correct 1 ms 436 KB Output is correct
11 Correct 1 ms 464 KB Output is correct
12 Correct 1 ms 440 KB Output is correct
13 Correct 2 ms 752 KB Output is correct
14 Correct 1 ms 440 KB Output is correct
15 Correct 4 ms 976 KB Output is correct
16 Correct 16 ms 1504 KB Output is correct
17 Correct 1 ms 692 KB Output is correct
18 Correct 21 ms 1604 KB Output is correct
19 Correct 1 ms 444 KB Output is correct
20 Correct 6 ms 980 KB Output is correct
21 Correct 10 ms 724 KB Output is correct
22 Correct 2 ms 984 KB Output is correct
23 Correct 1 ms 444 KB Output is correct
24 Correct 1 ms 616 KB Output is correct
25 Correct 11 ms 1568 KB Output is correct
26 Correct 13 ms 816 KB Output is correct
27 Correct 1 ms 444 KB Output is correct
28 Correct 21 ms 1080 KB Output is correct
29 Correct 19 ms 1440 KB Output is correct
30 Correct 23 ms 2012 KB Output is correct
31 Correct 1 ms 596 KB Output is correct
32 Correct 2 ms 472 KB Output is correct
33 Correct 1 ms 440 KB Output is correct
34 Correct 7 ms 804 KB Output is correct
35 Correct 1 ms 444 KB Output is correct
36 Correct 5 ms 700 KB Output is correct
37 Correct 1 ms 700 KB Output is correct
38 Correct 1 ms 440 KB Output is correct
39 Correct 10 ms 1264 KB Output is correct
40 Correct 18 ms 1444 KB Output is correct
41 Correct 13 ms 1288 KB Output is correct
42 Correct 10 ms 988 KB Output is correct
43 Correct 9 ms 1004 KB Output is correct
44 Correct 10 ms 1572 KB Output is correct
45 Correct 8 ms 1248 KB Output is correct
46 Correct 1 ms 444 KB Output is correct
47 Correct 9 ms 700 KB Output is correct
48 Correct 14 ms 960 KB Output is correct
49 Correct 3 ms 716 KB Output is correct
50 Correct 22 ms 1428 KB Output is correct
51 Correct 10 ms 984 KB Output is correct
52 Correct 1 ms 440 KB Output is correct
53 Correct 1 ms 440 KB Output is correct
54 Correct 12 ms 740 KB Output is correct
55 Correct 1 ms 444 KB Output is correct
56 Correct 21 ms 1744 KB Output is correct
57 Correct 14 ms 1124 KB Output is correct
58 Correct 17 ms 956 KB Output is correct
59 Correct 16 ms 1092 KB Output is correct
60 Correct 10 ms 1372 KB Output is correct
61 Correct 1 ms 440 KB Output is correct
62 Correct 1 ms 444 KB Output is correct
63 Correct 1 ms 440 KB Output is correct
64 Correct 2 ms 696 KB Output is correct
65 Correct 1 ms 444 KB Output is correct
66 Correct 2 ms 712 KB Output is correct
67 Correct 3 ms 964 KB Output is correct
68 Correct 1 ms 436 KB Output is correct
69 Correct 2 ms 464 KB Output is correct
70 Correct 2 ms 700 KB Output is correct
71 Correct 23 ms 1436 KB Output is correct
72 Correct 3 ms 476 KB Output is correct
73 Correct 25 ms 2416 KB Output is correct
74 Correct 22 ms 1020 KB Output is correct
75 Correct 1 ms 460 KB Output is correct
76 Correct 22 ms 1212 KB Output is correct
77 Correct 20 ms 1132 KB Output is correct
78 Correct 2 ms 436 KB Output is correct
79 Correct 12 ms 1236 KB Output is correct
80 Correct 20 ms 1204 KB Output is correct
81 Correct 24 ms 1460 KB Output is correct
82 Correct 22 ms 1508 KB Output is correct
83 Correct 1 ms 440 KB Output is correct
84 Correct 17 ms 992 KB Output is correct
85 Correct 23 ms 1724 KB Output is correct
86 Correct 8 ms 952 KB Output is correct
87 Correct 2 ms 696 KB Output is correct
88 Correct 6 ms 1272 KB Output is correct
89 Correct 9 ms 692 KB Output is correct
90 Correct 1 ms 436 KB Output is correct
91 Correct 8 ms 1360 KB Output is correct
92 Correct 3 ms 696 KB Output is correct
93 Correct 2 ms 708 KB Output is correct
94 Correct 2 ms 724 KB Output is correct
95 Correct 2 ms 948 KB Output is correct
96 Correct 2 ms 728 KB Output is correct
97 Correct 1 ms 440 KB Output is correct