Submission #1037113
Source Code Expand
#include <bits/stdc++.h> using namespace std; const int MOD=1000000007; int fact[10001]; int ifact[10001]; int powmod(int a, int b) { int ret=1; for(; b>0; b/=2) { if(b&1) ret=1LL*ret*a%MOD; a=1LL*a*a%MOD; } return ret; } int C(int n, int k) { return 1LL*fact[n]*ifact[k]%MOD*ifact[n-k]%MOD; } int solve(int a, int b, int c, int d, int f) { if(c==0) { if(d==0) return 1LL*C(a+b+f, a+b)*C(a+b, a)%MOD; return 0; } int e=C(d+c-1, d); return 1LL*e*C(a+b+c+f, a+b+c)%MOD*C(a+b+c, a+b)%MOD*C(a+b, a)%MOD; } int main() { fact[0]=1; ifact[0]=1; for(int i=1; i<=10000; i++) { fact[i]=1LL*fact[i-1]*i%MOD; ifact[i]=powmod(fact[i], MOD-2); } int N, A, B, C; scanf("%d%d%d%d", &N, &A, &B, &C); if(B%2==1) return printf("0\n"), 0; int ans=0; for(int c=0; c<=C; c+=3) for(int i=0; i<=min(A, C-c); i++) ans=(ans+solve(i, A-i, B/2, C-c-i, c/3))%MOD; printf("%d\n", ans); return 0; }
Submission Info
Submission Time | |
---|---|
Task | J - 123 Pairs |
User | FatalEagle |
Language | C++14 (GCC 5.4.1) |
Score | 1500 |
Code Size | 1123 Byte |
Status | AC |
Exec Time | 29 ms |
Memory | 256 KB |
Compile Error
./Main.cpp: In function ‘int main()’: ./Main.cpp:48:38: 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 | 16 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 | 4 ms | 256 KB |
005.txt | AC | 4 ms | 256 KB |
006.txt | AC | 4 ms | 256 KB |
007.txt | AC | 4 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 | 4 ms | 256 KB |
015.txt | AC | 23 ms | 256 KB |
016.txt | AC | 5 ms | 256 KB |
017.txt | AC | 9 ms | 256 KB |
018.txt | AC | 5 ms | 256 KB |
019.txt | AC | 10 ms | 256 KB |
020.txt | AC | 6 ms | 256 KB |
021.txt | AC | 20 ms | 256 KB |
022.txt | AC | 6 ms | 256 KB |
023.txt | AC | 8 ms | 256 KB |
024.txt | AC | 21 ms | 256 KB |
025.txt | AC | 7 ms | 256 KB |
026.txt | AC | 14 ms | 256 KB |
027.txt | AC | 19 ms | 256 KB |
028.txt | AC | 10 ms | 256 KB |
029.txt | AC | 12 ms | 256 KB |
030.txt | AC | 20 ms | 256 KB |
031.txt | AC | 21 ms | 256 KB |
032.txt | AC | 5 ms | 256 KB |
033.txt | AC | 4 ms | 256 KB |
034.txt | AC | 10 ms | 256 KB |
035.txt | AC | 12 ms | 256 KB |
036.txt | AC | 6 ms | 256 KB |
037.txt | AC | 4 ms | 256 KB |
038.txt | AC | 29 ms | 256 KB |
039.txt | AC | 4 ms | 256 KB |
040.txt | AC | 4 ms | 256 KB |
041.txt | AC | 8 ms | 256 KB |
042.txt | AC | 4 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 | 4 ms | 256 KB |