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Submission #1028660

# Submission time Handle Problem Language Result Execution time Memory
1028660 2024-07-20T06:48:55 Z DorostWef The Big Prize (IOI17_prize) C++17
97.68 / 100
 28 ms 432 KB 
#include "prize.h"
#include <bits/stdc++.h>

using namespace std;

int cnt;

int solve (int l, int r, int cl, int cr) {
	if (l > r || cl + cr == cnt)
		return 0;
	if (l == r) {
		vector<int> a = ask(l);
		if (a[0] + a[1] == 0)
			return l;
		return 0;
	}
	int wef = cl + cr;
	int mid = (l + r) >> 1;
	int mn = mid, mx = mid;
	bool L = true, R = true;
	for (int i = 0; i < cnt - wef; i++) {
		int x;
		if (i % 2 == 1) {
			x = mid + i / 2 + 1;
		} else {
			x = mid - i / 2;
		}
		mn = min (mn, x);
		mx = max (mx, x);
		vector<int> a = ask(x);
		if (a[0] + a[1] == 0)
			return x;
		if (a[0] + a[1] == cnt) {
			int ans = 0;
			if (L) {
				if (x == mn) 
					ans ^= solve (l, mn - 1, cl, a[1]);
				else
					ans ^= solve (l, mn - 1, cl, a[1] + i);
			}
			if (R) {
				if (x == mx)
					ans ^= solve (mx + 1, r, a[0], cr);
				else
					ans ^= solve (mx + 1, r, a[0] + i, cr);
			}
			return ans;
		}
		if (a[0] == 0)
			L = false;
		if (a[1] == 0)
			R = false;
	}
	return 0;
}

int find_best(int n) {
	for (int i = 0; i < min (n, 473); i++) {
		vector<int> a = ask(i);
		if(a[0] + a[1] == 0)
			return i;
		cnt = max (cnt, a[0] + a[1]);
	}
	return solve (0, n - 1, 0, 0);
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 344 KB Output is correct
2 Correct 2 ms 344 KB Output is correct
3 Correct 3 ms 344 KB Output is correct
4 Correct 2 ms 344 KB Output is correct
5 Correct 2 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 2 ms 344 KB Output is correct
8 Correct 2 ms 344 KB Output is correct
9 Correct 2 ms 344 KB Output is correct
10 Correct 2 ms 344 KB Output is correct

Subtask #2
77.68 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 2 ms 344 KB Output is correct
4 Correct 2 ms 344 KB Output is correct
5 Correct 2 ms 344 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 2 ms 344 KB Output is correct
8 Correct 2 ms 344 KB Output is correct
9 Correct 2 ms 344 KB Output is correct
10 Correct 2 ms 344 KB Output is correct
11 Correct 6 ms 344 KB Output is correct
12 Correct 5 ms 344 KB Output is correct
13 Correct 3 ms 344 KB Output is correct
14 Correct 5 ms 344 KB Output is correct
15 Correct 27 ms 428 KB Output is correct
16 Correct 14 ms 344 KB Output is correct
17 Correct 4 ms 344 KB Output is correct
18 Correct 21 ms 344 KB Output is correct
19 Correct 5 ms 344 KB Output is correct
20 Correct 14 ms 344 KB Output is correct
21 Correct 13 ms 344 KB Output is correct
22 Correct 21 ms 344 KB Output is correct
23 Correct 3 ms 344 KB Output is correct
24 Correct 4 ms 344 KB Output is correct
25 Correct 19 ms 344 KB Output is correct
26 Correct 22 ms 344 KB Output is correct
27 Correct 3 ms 344 KB Output is correct
28 Correct 18 ms 344 KB Output is correct
29 Correct 18 ms 432 KB Output is correct
30 Correct 21 ms 432 KB Output is correct
31 Correct 2 ms 344 KB Output is correct
32 Correct 4 ms 344 KB Output is correct
33 Correct 0 ms 344 KB Output is correct
34 Correct 22 ms 344 KB Output is correct
35 Correct 3 ms 344 KB Output is correct
36 Correct 19 ms 424 KB Output is correct
37 Correct 3 ms 344 KB Output is correct
38 Correct 2 ms 424 KB Output is correct
39 Correct 19 ms 428 KB Output is correct
40 Correct 20 ms 424 KB Output is correct
41 Correct 13 ms 424 KB Output is correct
42 Correct 17 ms 344 KB Output is correct
43 Correct 20 ms 344 KB Output is correct
44 Correct 20 ms 344 KB Output is correct
45 Correct 16 ms 344 KB Output is correct
46 Correct 2 ms 344 KB Output is correct
47 Correct 16 ms 344 KB Output is correct
48 Correct 22 ms 344 KB Output is correct
49 Correct 18 ms 344 KB Output is correct
50 Correct 22 ms 344 KB Output is correct
51 Correct 23 ms 344 KB Output is correct
52 Correct 19 ms 344 KB Output is correct
53 Correct 3 ms 344 KB Output is correct
54 Correct 19 ms 344 KB Output is correct
55 Correct 1 ms 344 KB Output is correct
56 Correct 24 ms 344 KB Output is correct
57 Correct 22 ms 340 KB Output is correct
58 Correct 20 ms 344 KB Output is correct
59 Correct 16 ms 344 KB Output is correct
60 Correct 28 ms 344 KB Output is correct
61 Correct 3 ms 344 KB Output is correct
62 Correct 3 ms 344 KB Output is correct
63 Correct 4 ms 344 KB Output is correct
64 Correct 2 ms 344 KB Output is correct
65 Correct 4 ms 344 KB Output is correct
66 Correct 4 ms 344 KB Output is correct
67 Correct 3 ms 344 KB Output is correct
68 Correct 2 ms 344 KB Output is correct
69 Correct 4 ms 344 KB Output is correct
70 Correct 5 ms 344 KB Output is correct
71 Partially correct 24 ms 344 KB Partially correct - number of queries: 5232
72 Correct 4 ms 344 KB Output is correct
73 Partially correct 13 ms 344 KB Partially correct - number of queries: 5169
74 Partially correct 21 ms 344 KB Partially correct - number of queries: 5196
75 Correct 3 ms 344 KB Output is correct
76 Correct 16 ms 344 KB Output is correct
77 Correct 25 ms 344 KB Output is correct
78 Correct 2 ms 344 KB Output is correct
79 Correct 12 ms 344 KB Output is correct
80 Correct 17 ms 344 KB Output is correct
81 Correct 19 ms 344 KB Output is correct
82 Correct 25 ms 344 KB Output is correct
83 Correct 3 ms 344 KB Output is correct
84 Correct 13 ms 344 KB Output is correct
85 Correct 21 ms 344 KB Output is correct
86 Correct 3 ms 344 KB Output is correct
87 Correct 4 ms 344 KB Output is correct
88 Correct 3 ms 344 KB Output is correct
89 Correct 3 ms 344 KB Output is correct
90 Correct 1 ms 344 KB Output is correct
91 Correct 2 ms 344 KB Output is correct
92 Correct 3 ms 344 KB Output is correct
93 Correct 4 ms 344 KB Output is correct
94 Correct 4 ms 344 KB Output is correct
95 Correct 6 ms 344 KB Output is correct
96 Correct 3 ms 344 KB Output is correct
97 Correct 3 ms 344 KB Output is correct