Submission #1814309


Source Code Expand

#include <cstdio>
#include <algorithm>
#define repu(i,x,y) for (int i=x; i<=y; ++i)
#define repd(i,x,y) for (int i=x; i>=y; --i)
using namespace std;

const int p=1000000007;
int n,a[110],f[55][110][110],ans;

int main()
{
    scanf("%d",&n);
    repu(i,1,n*2-1)
        scanf("%d",&a[i]);
    sort(a+1,a+n*2);
    f[n][1][1]=1;
    repd(i,n,2)
        repu(j,1,(n-i)*2+1)
            repu(k,1,j)
                if (f[i][j][k])
                {
                    int x=a[i-1]==a[i],y=j+(a[n*2-i]!=a[n*2-i+1]);
                    repu(l,x,y)
                        (f[i-1][y-x+1-max(0,abs(k-l)-1)][l<=k?l-x+1:k-x+2]+=f[i][j][k])%=p;
                }
    repu(i,1,n*2-1)
        repu(j,1,i)
            (ans+=f[1][i][j])%=p;
    printf("%d\n",ans);
    return 0;
}

Submission Info

Submission Time
Task F - Prefix Median
User dwjshift
Language C++14 (GCC 5.4.1)
Score 2000
Code Size 799 Byte
Status AC
Exec Time 21 ms
Memory 1408 KB

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:12:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
                   ^
./Main.cpp:14:26: 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
AC × 3
AC × 54
Set Name Test Cases
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 128 KB
00_example_02.txt AC 1 ms 128 KB
00_example_03.txt AC 1 ms 256 KB
01.txt AC 21 ms 1408 KB
02.txt AC 15 ms 1152 KB
03.txt AC 3 ms 640 KB
04.txt AC 2 ms 512 KB
05.txt AC 1 ms 384 KB
06.txt AC 8 ms 896 KB
07.txt AC 21 ms 1408 KB
08.txt AC 1 ms 384 KB
09.txt AC 21 ms 1408 KB
10.txt AC 1 ms 256 KB
11.txt AC 1 ms 256 KB
12.txt AC 1 ms 384 KB
13.txt AC 6 ms 768 KB
14.txt AC 10 ms 1024 KB
15.txt AC 1 ms 256 KB
16.txt AC 7 ms 1024 KB
17.txt AC 1 ms 256 KB
18.txt AC 1 ms 128 KB
19.txt AC 1 ms 128 KB
20.txt AC 1 ms 256 KB
21.txt AC 1 ms 256 KB
22.txt AC 1 ms 128 KB
23.txt AC 1 ms 512 KB
24.txt AC 1 ms 256 KB
25.txt AC 1 ms 512 KB
26.txt AC 2 ms 512 KB
27.txt AC 1 ms 256 KB
28.txt AC 6 ms 1024 KB
29.txt AC 1 ms 384 KB
30.txt AC 2 ms 512 KB
31.txt AC 1 ms 256 KB
32.txt AC 1 ms 512 KB
33.txt AC 1 ms 128 KB
34.txt AC 1 ms 384 KB
35.txt AC 3 ms 768 KB
36.txt AC 1 ms 128 KB
37.txt AC 5 ms 896 KB
38.txt AC 1 ms 512 KB
39.txt AC 1 ms 384 KB
40.txt AC 1 ms 256 KB
41.txt AC 3 ms 640 KB
42.txt AC 8 ms 1024 KB
43.txt AC 1 ms 384 KB
44.txt AC 8 ms 1024 KB
45.txt AC 1 ms 256 KB
46.txt AC 1 ms 256 KB
47.txt AC 1 ms 256 KB
48.txt AC 3 ms 640 KB
49.txt AC 4 ms 768 KB
50.txt AC 1 ms 256 KB
51.txt AC 1 ms 384 KB