Submission #1696003
Source Code Expand
#include <bits/stdc++.h> const int mod = 1e9 + 7; int n, tmp, a[101], dp[51][101][101]; int main() { scanf("%d", &n); for (int i = 1; i <= 2 * n - 1; ++i) { scanf("%d", a + i); } std::sort(a + 1, a + 2 * n); #ifdef DEBUG for (int i = 1; i <= 2 * n - 1; ++i) { printf("%d ", a[i]); } puts(""); #endif dp[n][1][1] = 1; for (int i = n; i > 1; --i) { bool fl = a[i - 1] != a[i], fr = a[2 * n - i + 1] != a[2 * n - i]; #ifdef DEBUG printf("%d %d\n", fl, fr); #endif for (int j = 1; j <= (n - i + 1) * 2 - 1; ++j) { for (int k = j; k <= (n - i + 1) * 2 - 1; ++k) { if(tmp = dp[i][j][k]) { #ifdef DEBUG printf("dp[%d][%d][%d] = %d\n", i, j, k, tmp); #endif for (int nxt = 1 - fl; nxt < j; ++nxt) { (dp[i - 1][nxt + fl][k + fl + fr - (j - nxt - 1)] += tmp) %= mod; } (dp[i - 1][j + fl][k + fl + fr] += tmp) %= mod; for (int nxt = j + 1; nxt <= k + fr; ++nxt) { (dp[i - 1][j + 1 + fl][k + fl + fr - (nxt - j - 1)] += tmp) %= mod; } } } } } tmp = 0; for (int j = 1; j <= 2 * n - 1; ++j) { for (int k = j; k <= 2 * n - 1; ++k) { (tmp += dp[1][j][k]) %= mod; } } printf("%d\n", tmp); return 0; }
Submission Info
Submission Time | |
---|---|
Task | F - Prefix Median |
User | OMTWOCZWEIXVI |
Language | C++14 (GCC 5.4.1) |
Score | 2000 |
Code Size | 1241 Byte |
Status | AC |
Exec Time | 13 ms |
Memory | 1408 KB |
Compile Error
./Main.cpp: In function ‘int main()’: ./Main.cpp:8:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ ./Main.cpp:10:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", a + i); ^
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 2000 / 2000 | ||||
Status |
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Set Name | Test Cases |
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Sample | 00_example_01.txt, 00_example_02.txt, 00_example_03.txt |
All | 00_example_01.txt, 00_example_02.txt, 00_example_03.txt, 01.txt, 02.txt, 03.txt, 04.txt, 05.txt, 06.txt, 07.txt, 08.txt, 09.txt, 10.txt, 11.txt, 12.txt, 13.txt, 14.txt, 15.txt, 16.txt, 17.txt, 18.txt, 19.txt, 20.txt, 21.txt, 22.txt, 23.txt, 24.txt, 25.txt, 26.txt, 27.txt, 28.txt, 29.txt, 30.txt, 31.txt, 32.txt, 33.txt, 34.txt, 35.txt, 36.txt, 37.txt, 38.txt, 39.txt, 40.txt, 41.txt, 42.txt, 43.txt, 44.txt, 45.txt, 46.txt, 47.txt, 48.txt, 49.txt, 50.txt, 51.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
00_example_01.txt | AC | 1 ms | 256 KB |
00_example_02.txt | AC | 1 ms | 256 KB |
00_example_03.txt | AC | 1 ms | 384 KB |
01.txt | AC | 13 ms | 1408 KB |
02.txt | AC | 9 ms | 1280 KB |
03.txt | AC | 3 ms | 640 KB |
04.txt | AC | 2 ms | 512 KB |
05.txt | AC | 2 ms | 512 KB |
06.txt | AC | 5 ms | 1024 KB |
07.txt | AC | 13 ms | 1408 KB |
08.txt | AC | 1 ms | 512 KB |
09.txt | AC | 13 ms | 1408 KB |
10.txt | AC | 1 ms | 256 KB |
11.txt | AC | 1 ms | 384 KB |
12.txt | AC | 1 ms | 384 KB |
13.txt | AC | 4 ms | 896 KB |
14.txt | AC | 6 ms | 1024 KB |
15.txt | AC | 1 ms | 256 KB |
16.txt | AC | 5 ms | 1024 KB |
17.txt | AC | 1 ms | 384 KB |
18.txt | AC | 1 ms | 256 KB |
19.txt | AC | 1 ms | 256 KB |
20.txt | AC | 1 ms | 384 KB |
21.txt | AC | 1 ms | 384 KB |
22.txt | AC | 1 ms | 256 KB |
23.txt | AC | 2 ms | 512 KB |
24.txt | AC | 1 ms | 384 KB |
25.txt | AC | 2 ms | 512 KB |
26.txt | AC | 2 ms | 640 KB |
27.txt | AC | 1 ms | 384 KB |
28.txt | AC | 5 ms | 1024 KB |
29.txt | AC | 1 ms | 512 KB |
30.txt | AC | 2 ms | 640 KB |
31.txt | AC | 1 ms | 256 KB |
32.txt | AC | 2 ms | 512 KB |
33.txt | AC | 1 ms | 256 KB |
34.txt | AC | 2 ms | 512 KB |
35.txt | AC | 3 ms | 896 KB |
36.txt | AC | 1 ms | 256 KB |
37.txt | AC | 4 ms | 1024 KB |
38.txt | AC | 2 ms | 640 KB |
39.txt | AC | 2 ms | 512 KB |
40.txt | AC | 1 ms | 384 KB |
41.txt | AC | 3 ms | 768 KB |
42.txt | AC | 5 ms | 1152 KB |
43.txt | AC | 1 ms | 384 KB |
44.txt | AC | 6 ms | 1152 KB |
45.txt | AC | 1 ms | 256 KB |
46.txt | AC | 1 ms | 384 KB |
47.txt | AC | 1 ms | 384 KB |
48.txt | AC | 2 ms | 768 KB |
49.txt | AC | 3 ms | 896 KB |
50.txt | AC | 1 ms | 256 KB |
51.txt | AC | 2 ms | 512 KB |