Submission #333191

# Submission time Handle Problem Language Result Execution time Memory
333191 2020-12-04T22:25:26 Z mohamedsobhi777 The Big Prize (IOI17_prize) C++14
90 / 100
111 ms 5484 KB
#include "prize.h"
#include <bits/stdc++.h>
using namespace std;

const int N = 2e5 + 10;

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 <= 4000)
		return solve1(n);

	for (int i = 0; i < 1000; ++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 < 1000; ++i)
		enough += sum(i) != mc;
	
	for (int i = 1000; i < n; ++i)
	{
		Ask(i);
		if (sum(i) != mc)
		{
			if (sum(i) == 0)
				return i;
			++enough;
			continue;
		}

		int lo = i, hi = 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 17 ms 5100 KB Output is correct
2 Correct 9 ms 5124 KB Output is correct
3 Correct 10 ms 5100 KB Output is correct
4 Correct 17 ms 5100 KB Output is correct
5 Correct 13 ms 5100 KB Output is correct
6 Correct 4 ms 4972 KB Output is correct
7 Correct 17 ms 5100 KB Output is correct
8 Correct 14 ms 5100 KB Output is correct
9 Correct 14 ms 5100 KB Output is correct
10 Correct 16 ms 5100 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 13 ms 5112 KB Output is correct
2 Correct 17 ms 5100 KB Output is correct
3 Correct 12 ms 5124 KB Output is correct
4 Correct 15 ms 5076 KB Output is correct
5 Correct 12 ms 5120 KB Output is correct
6 Correct 4 ms 4972 KB Output is correct
7 Correct 12 ms 5100 KB Output is correct
8 Correct 9 ms 5124 KB Output is correct
9 Correct 17 ms 5100 KB Output is correct
10 Correct 13 ms 5100 KB Output is correct
11 Correct 16 ms 5100 KB Output is correct
12 Correct 9 ms 5124 KB Output is correct
13 Correct 23 ms 5100 KB Output is correct
14 Correct 16 ms 5100 KB Output is correct
15 Correct 16 ms 5172 KB Output is correct
16 Partially correct 80 ms 5228 KB Partially correct - number of queries: 7692
17 Correct 9 ms 4972 KB Output is correct
18 Partially correct 66 ms 5320 KB Partially correct - number of queries: 8853
19 Correct 9 ms 4972 KB Output is correct
20 Correct 20 ms 5196 KB Output is correct
21 Correct 43 ms 5100 KB Output is correct
22 Correct 20 ms 5100 KB Output is correct
23 Correct 10 ms 5124 KB Output is correct
24 Correct 13 ms 5100 KB Output is correct
25 Partially correct 53 ms 5228 KB Partially correct - number of queries: 5393
26 Partially correct 53 ms 5484 KB Partially correct - number of queries: 5318
27 Correct 18 ms 5100 KB Output is correct
28 Partially correct 72 ms 5356 KB Partially correct - number of queries: 8323
29 Partially correct 89 ms 5228 KB Partially correct - number of queries: 6618
30 Partially correct 105 ms 5356 KB Partially correct - number of queries: 8781
31 Correct 7 ms 4972 KB Output is correct
32 Correct 28 ms 5100 KB Output is correct
33 Correct 4 ms 4972 KB Output is correct
34 Correct 34 ms 5100 KB Output is correct
35 Correct 19 ms 5100 KB Output is correct
36 Correct 38 ms 5100 KB Output is correct
37 Correct 18 ms 5100 KB Output is correct
38 Correct 16 ms 5100 KB Output is correct
39 Correct 77 ms 5100 KB Output is correct
40 Partially correct 84 ms 5356 KB Partially correct - number of queries: 7649
41 Partially correct 67 ms 5384 KB Partially correct - number of queries: 5713
42 Partially correct 47 ms 5228 KB Partially correct - number of queries: 5713
43 Partially correct 72 ms 5228 KB Partially correct - number of queries: 5230
44 Correct 42 ms 5160 KB Output is correct
45 Correct 39 ms 5100 KB Output is correct
46 Correct 9 ms 4972 KB Output is correct
47 Correct 58 ms 5144 KB Output is correct
48 Partially correct 65 ms 5360 KB Partially correct - number of queries: 6809
49 Correct 12 ms 5152 KB Output is correct
50 Partially correct 108 ms 5356 KB Partially correct - number of queries: 8853
51 Correct 37 ms 5320 KB Output is correct
52 Correct 18 ms 5100 KB Output is correct
53 Correct 19 ms 5100 KB Output is correct
54 Correct 52 ms 5256 KB Output is correct
55 Correct 9 ms 4972 KB Output is correct
56 Partially correct 80 ms 5356 KB Partially correct - number of queries: 8848
57 Partially correct 63 ms 5228 KB Partially correct - number of queries: 6710
58 Partially correct 65 ms 5228 KB Partially correct - number of queries: 6791
59 Partially correct 70 ms 5228 KB Partially correct - number of queries: 5710
60 Partially correct 52 ms 5228 KB Partially correct - number of queries: 5343
61 Correct 16 ms 5100 KB Output is correct
62 Correct 13 ms 5100 KB Output is correct
63 Correct 11 ms 5116 KB Output is correct
64 Correct 16 ms 5100 KB Output is correct
65 Correct 14 ms 5100 KB Output is correct
66 Correct 18 ms 5100 KB Output is correct
67 Correct 17 ms 5100 KB Output is correct
68 Correct 11 ms 4972 KB Output is correct
69 Correct 23 ms 5076 KB Output is correct
70 Correct 12 ms 5100 KB Output is correct
71 Partially correct 99 ms 5476 KB Partially correct - number of queries: 8772
72 Correct 23 ms 5100 KB Output is correct
73 Partially correct 111 ms 5356 KB Partially correct - number of queries: 8668
74 Partially correct 77 ms 5228 KB Partially correct - number of queries: 8707
75 Correct 14 ms 5100 KB Output is correct
76 Partially correct 90 ms 5356 KB Partially correct - number of queries: 7617
77 Partially correct 80 ms 5356 KB Partially correct - number of queries: 8856
78 Correct 24 ms 5100 KB Output is correct
79 Correct 36 ms 5228 KB Output is correct
80 Partially correct 83 ms 5356 KB Partially correct - number of queries: 8895
81 Partially correct 80 ms 5356 KB Partially correct - number of queries: 8922
82 Partially correct 90 ms 5228 KB Partially correct - number of queries: 8761
83 Correct 16 ms 5100 KB Output is correct
84 Partially correct 74 ms 5228 KB Partially correct - number of queries: 7403
85 Partially correct 88 ms 5404 KB Partially correct - number of queries: 8865
86 Correct 13 ms 5100 KB Output is correct
87 Correct 13 ms 5100 KB Output is correct
88 Correct 14 ms 5100 KB Output is correct
89 Correct 17 ms 5100 KB Output is correct
90 Correct 14 ms 5100 KB Output is correct
91 Correct 13 ms 5100 KB Output is correct
92 Correct 13 ms 5100 KB Output is correct
93 Correct 22 ms 5100 KB Output is correct
94 Correct 17 ms 5100 KB Output is correct
95 Correct 16 ms 5228 KB Output is correct
96 Correct 20 ms 5100 KB Output is correct
97 Correct 12 ms 5100 KB Output is correct