Submission #333203

# Submission time Handle Problem Language Result Execution time Memory
333203 2020-12-04T22:43:01 Z mohamedsobhi777 The Big Prize (IOI17_prize) C++14
90 / 100
89 ms 5432 KB
#include "prize.h"
#include <bits/stdc++.h>
using namespace std;

const int N = 2e5 + 10;
const int thr = 950;
vector<int> Qu[200000 + 10];
int freq[200000 + 10];
int enough;

vector<int> Ask(int i)
{
	if (Qu[i].empty())
		Qu[i] = ask(i);
	return Qu[i];
}

inline int sum(int i) { return Qu[i][0] + Qu[i][1]; }

int solve1(int n)
{
	for (int i = 0; i < n; ++i)
	{
		Ask(i);
		if (!sum(i))
			return i;
	}
}

int find_best(int n)
{
	if (n <= 4800)
		return solve1(n);

	for (int i = 0; i < thr; ++i)
	{
		Ask(i);
		freq[sum(i)]++;
		if (sum(i) == 0)
			return i;
	}
	int mc = 0, Max = 0;
	for (int i = 0; i < N; ++i)
	{
		if (freq[i] > Max)
			Max = freq[i], mc = i;
	}
	for (int i = 0; i < thr; ++i)
		enough += sum(i) != mc;

	for (int i = thr; i < n; ++i)
	{
		Ask(i);
		if (sum(i) != mc)
		{
			if (sum(i) == 0)
				return i;
			++enough;
			continue;
		}

		int lo = i, hi = min(i + 500, n - 1);
		int j = i;
		while (lo <= hi)
		{
			int mid = (lo + hi) >> 1;
			Ask(mid);
			if (sum(mid) != mc || Qu[mid][0] - enough > 0)
				hi = mid - 1;
			else
				j = mid, lo = mid + 1;
		}
		i = j;
	}
}

Compilation message

prize.cpp: In function 'int solve1(int)':
prize.cpp:28:1: warning: control reaches end of non-void function [-Wreturn-type]
   28 | }
      | ^
prize.cpp: In function 'int find_best(int)':
prize.cpp:75:1: warning: control reaches end of non-void function [-Wreturn-type]
   75 | }
      | ^
# Verdict Execution time Memory Grader output
1 Correct 18 ms 5100 KB Output is correct
2 Correct 32 ms 5228 KB Output is correct
3 Correct 19 ms 5196 KB Output is correct
4 Correct 44 ms 5228 KB Output is correct
5 Correct 31 ms 5100 KB Output is correct
6 Correct 4 ms 5100 KB Output is correct
7 Correct 31 ms 5100 KB Output is correct
8 Correct 29 ms 5100 KB Output is correct
9 Correct 20 ms 5196 KB Output is correct
10 Correct 44 ms 5228 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 12 ms 5152 KB Output is correct
2 Correct 35 ms 5100 KB Output is correct
3 Correct 32 ms 5228 KB Output is correct
4 Correct 46 ms 5356 KB Output is correct
5 Correct 19 ms 5196 KB Output is correct
6 Correct 4 ms 4972 KB Output is correct
7 Correct 20 ms 5196 KB Output is correct
8 Correct 26 ms 5100 KB Output is correct
9 Correct 22 ms 5300 KB Output is correct
10 Correct 47 ms 5228 KB Output is correct
11 Correct 30 ms 5100 KB Output is correct
12 Correct 15 ms 5100 KB Output is correct
13 Partially correct 52 ms 5228 KB Partially correct - number of queries: 5003
14 Correct 17 ms 5100 KB Output is correct
15 Correct 19 ms 5100 KB Output is correct
16 Correct 39 ms 5228 KB Output is correct
17 Correct 6 ms 5116 KB Output is correct
18 Partially correct 44 ms 5292 KB Partially correct - number of queries: 5356
19 Correct 8 ms 4972 KB Output is correct
20 Correct 20 ms 5228 KB Output is correct
21 Correct 28 ms 5100 KB Output is correct
22 Correct 20 ms 5100 KB Output is correct
23 Correct 18 ms 5100 KB Output is correct
24 Correct 10 ms 5124 KB Output is correct
25 Correct 43 ms 5228 KB Output is correct
26 Correct 42 ms 5100 KB Output is correct
27 Correct 28 ms 5100 KB Output is correct
28 Partially correct 66 ms 5228 KB Partially correct - number of queries: 7132
29 Partially correct 73 ms 5244 KB Partially correct - number of queries: 6193
30 Partially correct 54 ms 5228 KB Partially correct - number of queries: 5244
31 Correct 9 ms 4972 KB Output is correct
32 Correct 33 ms 5100 KB Output is correct
33 Correct 4 ms 4972 KB Output is correct
34 Correct 27 ms 5100 KB Output is correct
35 Correct 30 ms 5284 KB Output is correct
36 Correct 20 ms 5100 KB Output is correct
37 Correct 20 ms 5100 KB Output is correct
38 Correct 17 ms 5100 KB Output is correct
39 Correct 29 ms 5100 KB Output is correct
40 Correct 58 ms 5256 KB Output is correct
41 Correct 32 ms 5296 KB Output is correct
42 Correct 37 ms 5100 KB Output is correct
43 Correct 33 ms 5100 KB Output is correct
44 Correct 19 ms 5160 KB Output is correct
45 Correct 35 ms 5100 KB Output is correct
46 Correct 10 ms 4972 KB Output is correct
47 Correct 38 ms 5100 KB Output is correct
48 Correct 39 ms 5100 KB Output is correct
49 Correct 17 ms 5100 KB Output is correct
50 Partially correct 32 ms 5268 KB Partially correct - number of queries: 5374
51 Correct 31 ms 5100 KB Output is correct
52 Correct 17 ms 5100 KB Output is correct
53 Correct 43 ms 5100 KB Output is correct
54 Correct 31 ms 5100 KB Output is correct
55 Correct 7 ms 4972 KB Output is correct
56 Partially correct 57 ms 5228 KB Partially correct - number of queries: 5362
57 Correct 42 ms 5100 KB Output is correct
58 Correct 42 ms 5100 KB Output is correct
59 Correct 46 ms 5228 KB Output is correct
60 Correct 44 ms 5100 KB Output is correct
61 Correct 44 ms 5228 KB Output is correct
62 Correct 11 ms 5120 KB Output is correct
63 Correct 61 ms 5100 KB Output is correct
64 Correct 41 ms 5100 KB Output is correct
65 Correct 59 ms 5244 KB Output is correct
66 Partially correct 68 ms 5228 KB Partially correct - number of queries: 5384
67 Correct 54 ms 5196 KB Output is correct
68 Correct 8 ms 4972 KB Output is correct
69 Partially correct 60 ms 5356 KB Partially correct - number of queries: 5367
70 Correct 60 ms 5228 KB Output is correct
71 Partially correct 83 ms 5228 KB Partially correct - number of queries: 6818
72 Partially correct 45 ms 5228 KB Partially correct - number of queries: 5057
73 Partially correct 62 ms 5292 KB Partially correct - number of queries: 6786
74 Partially correct 74 ms 5176 KB Partially correct - number of queries: 6802
75 Correct 65 ms 5228 KB Output is correct
76 Partially correct 65 ms 5432 KB Partially correct - number of queries: 6529
77 Partially correct 85 ms 5228 KB Partially correct - number of queries: 7072
78 Partially correct 67 ms 5228 KB Partially correct - number of queries: 5065
79 Partially correct 64 ms 5228 KB Partially correct - number of queries: 5869
80 Partially correct 63 ms 5228 KB Partially correct - number of queries: 7032
81 Partially correct 61 ms 5228 KB Partially correct - number of queries: 7075
82 Partially correct 89 ms 5260 KB Partially correct - number of queries: 7014
83 Correct 51 ms 5228 KB Output is correct
84 Partially correct 84 ms 5356 KB Partially correct - number of queries: 6640
85 Partially correct 68 ms 5228 KB Partially correct - number of queries: 7014
86 Correct 54 ms 5228 KB Output is correct
87 Correct 30 ms 5340 KB Output is correct
88 Correct 57 ms 5228 KB Output is correct
89 Correct 52 ms 5228 KB Output is correct
90 Correct 67 ms 5228 KB Output is correct
91 Correct 45 ms 5228 KB Output is correct
92 Correct 48 ms 5232 KB Output is correct
93 Correct 41 ms 5228 KB Output is correct
94 Partially correct 53 ms 5228 KB Partially correct - number of queries: 5040
95 Partially correct 44 ms 5228 KB Partially correct - number of queries: 5006
96 Partially correct 57 ms 5228 KB Partially correct - number of queries: 5018
97 Correct 40 ms 5100 KB Output is correct