Submission #1087369
Source Code Expand
#include<stdio.h> int A, B, C; long long Mod = 1000000007, F[5010], InvF[5010], Res; long long Pow(long long a, int b){ long long r = 1; while(b){ if(b&1)r=r*a%Mod; a=a*a%Mod;b>>=1; } return r; } long long H(int a, int b){ if(!a&&!b)return 1; return F[a+b-1] * InvF[b] % Mod * InvF[a-1] % Mod; } int main(){ int n; scanf("%d%d%d%d",&n,&A,&B,&C); int i, j; F[0]=InvF[0]=1; for(i=1;i<=5000;i++){ F[i]=F[i-1]*i%Mod; InvF[i]=Pow(F[i],Mod-2); } if(B%2){ printf("0\n"); return 0; } for(i=0;i<=A;i++){ for(j=0;A-i+3*j<=C;j++){ int s = C - (A-i+3*j); Res = (Res +F[A+j+B/2] * InvF[i] % Mod * InvF[j] % Mod * InvF[A-i] % Mod * InvF[B/2] % Mod * H(B/2,s))%Mod; } } printf("%lld\n",Res); }
Submission Info
Submission Time | |
---|---|
Task | J - 123 Pairs |
User | ainta |
Language | C++14 (GCC 5.4.1) |
Score | 1500 |
Code Size | 869 Byte |
Status | AC |
Exec Time | 90 ms |
Memory | 256 KB |
Compile Error
./Main.cpp: In function ‘int main()’: ./Main.cpp:18:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d",&n,&A,&B,&C); ^
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 1500 / 1500 | ||||
Status |
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Set Name | Test Cases |
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Sample | example0.txt, example1.txt |
All | 000.txt, 001.txt, 002.txt, 003.txt, 004.txt, 005.txt, 006.txt, 007.txt, 008.txt, 009.txt, 010.txt, 011.txt, 012.txt, 013.txt, 014.txt, 015.txt, 016.txt, 017.txt, 018.txt, 019.txt, 020.txt, 021.txt, 022.txt, 023.txt, 024.txt, 025.txt, 026.txt, 027.txt, 028.txt, 029.txt, 030.txt, 031.txt, 032.txt, 033.txt, 034.txt, 035.txt, 036.txt, 037.txt, 038.txt, 039.txt, 040.txt, 041.txt, 042.txt, 043.txt, 044.txt, 045.txt, 046.txt, 047.txt, 048.txt, 049.txt, example0.txt, example1.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
000.txt | AC | 45 ms | 256 KB |
001.txt | AC | 4 ms | 256 KB |
002.txt | AC | 4 ms | 256 KB |
003.txt | AC | 4 ms | 256 KB |
004.txt | AC | 5 ms | 256 KB |
005.txt | AC | 4 ms | 256 KB |
006.txt | AC | 4 ms | 256 KB |
007.txt | AC | 5 ms | 256 KB |
008.txt | AC | 4 ms | 256 KB |
009.txt | AC | 4 ms | 256 KB |
010.txt | AC | 4 ms | 256 KB |
011.txt | AC | 4 ms | 256 KB |
012.txt | AC | 4 ms | 256 KB |
013.txt | AC | 4 ms | 256 KB |
014.txt | AC | 5 ms | 256 KB |
015.txt | AC | 71 ms | 256 KB |
016.txt | AC | 9 ms | 256 KB |
017.txt | AC | 23 ms | 256 KB |
018.txt | AC | 8 ms | 256 KB |
019.txt | AC | 26 ms | 256 KB |
020.txt | AC | 11 ms | 256 KB |
021.txt | AC | 62 ms | 256 KB |
022.txt | AC | 10 ms | 256 KB |
023.txt | AC | 16 ms | 256 KB |
024.txt | AC | 64 ms | 256 KB |
025.txt | AC | 13 ms | 256 KB |
026.txt | AC | 39 ms | 256 KB |
027.txt | AC | 59 ms | 256 KB |
028.txt | AC | 24 ms | 256 KB |
029.txt | AC | 30 ms | 256 KB |
030.txt | AC | 59 ms | 256 KB |
031.txt | AC | 64 ms | 256 KB |
032.txt | AC | 9 ms | 256 KB |
033.txt | AC | 4 ms | 256 KB |
034.txt | AC | 26 ms | 256 KB |
035.txt | AC | 34 ms | 256 KB |
036.txt | AC | 9 ms | 256 KB |
037.txt | AC | 4 ms | 256 KB |
038.txt | AC | 90 ms | 256 KB |
039.txt | AC | 4 ms | 256 KB |
040.txt | AC | 4 ms | 256 KB |
041.txt | AC | 19 ms | 256 KB |
042.txt | AC | 5 ms | 256 KB |
043.txt | AC | 4 ms | 256 KB |
044.txt | AC | 4 ms | 256 KB |
045.txt | AC | 4 ms | 256 KB |
046.txt | AC | 4 ms | 256 KB |
047.txt | AC | 4 ms | 256 KB |
048.txt | AC | 4 ms | 256 KB |
049.txt | AC | 4 ms | 256 KB |
example0.txt | AC | 4 ms | 256 KB |
example1.txt | AC | 5 ms | 256 KB |