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Submission #267823

# Submission time Handle Problem Language Result Execution time Memory
267823 2020-08-16T06:28:26 Z PeppaPig The Big Prize (IOI17_prize) C++14
100 / 100
 99 ms 11392 KB 
#include "prize.h"
#include <bits/stdc++.h>

using namespace std;

vector<vector<int> > val;

vector<int> query(int i) {
	if(val[i][0] == -1) return val[i] = ask(i);
	return val[i];
}

bool valid(vector<int> vec) {
	return vec[0] + vec[1] == 0;
}

void solve(int l, int r, vector<int> &L, vector<int> &R, int &ans) {
	if(r - l <= 1 || make_pair(L[0], L[1]) == make_pair(R[0], R[1]) || ~ans) return;

	int mid = (l + r) >> 1;
	vector<int> M = query(mid);
	if(valid(M)) return void(ans = mid);

	if(L[0] + L[1] == R[0] + R[1] && M[0] + M[1] < L[0] + L[1] && L[0] == R[0] - 1)
		return;

	solve(l, mid, L, M, ans), solve(mid, r, M, R, ans);
}

int find_best(int n) {
	val = vector<vector<int> >(n, vector<int>(2, -1));

	vector<int> l = query(0), r = query(n - 1);
	if(valid(l)) return 0;
	if(valid(r)) return n - 1;

	int ans = -1;
	solve(0, n - 1, l, r, ans);

	return ans;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 11328 KB Output is correct
2 Correct 14 ms 11264 KB Output is correct
3 Correct 14 ms 11256 KB Output is correct
4 Correct 14 ms 11256 KB Output is correct
5 Correct 14 ms 11264 KB Output is correct
6 Correct 16 ms 11256 KB Output is correct
7 Correct 14 ms 11256 KB Output is correct
8 Correct 14 ms 11256 KB Output is correct
9 Correct 14 ms 11264 KB Output is correct
10 Correct 16 ms 11264 KB Output is correct

Subtask #2
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 11264 KB Output is correct
2 Correct 16 ms 11264 KB Output is correct
3 Correct 14 ms 11264 KB Output is correct
4 Correct 14 ms 11256 KB Output is correct
5 Correct 17 ms 11260 KB Output is correct
6 Correct 14 ms 11256 KB Output is correct
7 Correct 14 ms 11248 KB Output is correct
8 Correct 23 ms 11256 KB Output is correct
9 Correct 16 ms 11264 KB Output is correct
10 Correct 17 ms 11264 KB Output is correct
11 Correct 18 ms 11264 KB Output is correct
12 Correct 16 ms 11256 KB Output is correct
13 Correct 20 ms 11256 KB Output is correct
14 Correct 3 ms 1536 KB Output is correct
15 Correct 17 ms 11264 KB Output is correct
16 Correct 52 ms 11264 KB Output is correct
17 Correct 14 ms 11256 KB Output is correct
18 Correct 39 ms 11256 KB Output is correct
19 Correct 16 ms 11256 KB Output is correct
20 Correct 22 ms 5760 KB Output is correct
21 Correct 34 ms 11256 KB Output is correct
22 Correct 19 ms 11248 KB Output is correct
23 Correct 14 ms 11256 KB Output is correct
24 Correct 14 ms 11256 KB Output is correct
25 Correct 39 ms 11264 KB Output is correct
26 Correct 34 ms 11256 KB Output is correct
27 Correct 17 ms 11264 KB Output is correct
28 Correct 34 ms 11264 KB Output is correct
29 Correct 39 ms 11256 KB Output is correct
30 Correct 53 ms 11264 KB Output is correct
31 Correct 14 ms 11264 KB Output is correct
32 Correct 16 ms 11256 KB Output is correct
33 Correct 0 ms 256 KB Output is correct
34 Correct 29 ms 11256 KB Output is correct
35 Correct 17 ms 11256 KB Output is correct
36 Correct 21 ms 11264 KB Output is correct
37 Correct 16 ms 11264 KB Output is correct
38 Correct 17 ms 11256 KB Output is correct
39 Correct 40 ms 11256 KB Output is correct
40 Correct 65 ms 11264 KB Output is correct
41 Correct 37 ms 11264 KB Output is correct
42 Correct 37 ms 11256 KB Output is correct
43 Correct 35 ms 11264 KB Output is correct
44 Correct 42 ms 11240 KB Output is correct
45 Correct 25 ms 11256 KB Output is correct
46 Correct 14 ms 11264 KB Output is correct
47 Correct 33 ms 11256 KB Output is correct
48 Correct 49 ms 11264 KB Output is correct
49 Correct 20 ms 11264 KB Output is correct
50 Correct 79 ms 11240 KB Output is correct
51 Correct 34 ms 11264 KB Output is correct
52 Correct 17 ms 11240 KB Output is correct
53 Correct 21 ms 11256 KB Output is correct
54 Correct 42 ms 11240 KB Output is correct
55 Correct 18 ms 11256 KB Output is correct
56 Correct 49 ms 11256 KB Output is correct
57 Correct 54 ms 11256 KB Output is correct
58 Correct 51 ms 11256 KB Output is correct
59 Correct 52 ms 11264 KB Output is correct
60 Correct 33 ms 11256 KB Output is correct
61 Correct 15 ms 11264 KB Output is correct
62 Correct 20 ms 11328 KB Output is correct
63 Correct 15 ms 11240 KB Output is correct
64 Correct 15 ms 11264 KB Output is correct
65 Correct 17 ms 11264 KB Output is correct
66 Correct 20 ms 11296 KB Output is correct
67 Correct 14 ms 11256 KB Output is correct
68 Correct 16 ms 11392 KB Output is correct
69 Correct 14 ms 11256 KB Output is correct
70 Correct 16 ms 11264 KB Output is correct
71 Correct 44 ms 11264 KB Output is correct
72 Correct 18 ms 11264 KB Output is correct
73 Correct 58 ms 11264 KB Output is correct
74 Correct 40 ms 11264 KB Output is correct
75 Correct 18 ms 11264 KB Output is correct
76 Correct 70 ms 11264 KB Output is correct
77 Correct 55 ms 11264 KB Output is correct
78 Correct 17 ms 11256 KB Output is correct
79 Correct 52 ms 11264 KB Output is correct
80 Correct 68 ms 11264 KB Output is correct
81 Correct 70 ms 11216 KB Output is correct
82 Correct 99 ms 11264 KB Output is correct
83 Correct 18 ms 11264 KB Output is correct
84 Correct 68 ms 11264 KB Output is correct
85 Correct 45 ms 11264 KB Output is correct
86 Correct 17 ms 11264 KB Output is correct
87 Correct 17 ms 11264 KB Output is correct
88 Correct 22 ms 11264 KB Output is correct
89 Correct 18 ms 11264 KB Output is correct
90 Correct 15 ms 11264 KB Output is correct
91 Correct 14 ms 11264 KB Output is correct
92 Correct 19 ms 11264 KB Output is correct
93 Correct 18 ms 11264 KB Output is correct
94 Correct 20 ms 11264 KB Output is correct
95 Correct 19 ms 11264 KB Output is correct
96 Correct 19 ms 11264 KB Output is correct
97 Correct 20 ms 11264 KB Output is correct