Submission #2091601
Source Code Expand
#include <bits/stdc++.h> using namespace std; typedef signed long long ll; #undef _P #define _P(...) (void)printf(__VA_ARGS__) #define FOR(x,to) for(x=0;x<(to);x++) #define FORR(x,arr) for(auto& x:arr) #define ITR(x,c) for(__typeof(c.begin()) x=c.begin();x!=c.end();x++) #define ALL(a) (a.begin()),(a.end()) #define ZERO(a) memset(a,0,sizeof(a)) #define MINUS(a) memset(a,0xff,sizeof(a)) //------------------------------------------------------- const int NUM_=400001; static ll fact[NUM_+1],factr[NUM_+1],inv[NUM_+1]; ll mo=1000000007; ll combi(ll N_, ll C_) { if (fact[0]==0) { inv[1]=fact[0]=factr[0]=1; for (int i=2;i<=NUM_;++i) inv[i] = inv[mo % i] * (mo - mo / i) % mo; for (int i=1;i<=NUM_;++i) fact[i]=fact[i-1]*i%mo, factr[i]=factr[i-1]*inv[i]%mo; } if(C_<0 || C_>N_) return 0; return factr[C_]*fact[N_]%mo*factr[N_-C_]%mo; } ll hcomb(int P_,int Q_) { return (P_==0&&Q_==0)?1:combi(P_+Q_-1,Q_);} int N,A,B,C; void solve() { int i,j,k,l,r,x,y;; combi(0,0); cin>>N>>A>>B>>C; ll ret=0; for(int p=0;p<=min(A,C);p++) for(int q=0;p+3*q<=C;q++) { int s1=A-p; int s2=B/2; int s3=C-(p+3*q); ll tot=fact[p+q+s1+s2]*factr[s1]%mo*factr[p]%mo*factr[q]%mo*factr[s2]%mo; tot*=hcomb(s2,s3); ret+=tot%mo; } if(B%2) ret=0; cout<<ret%mo<<endl; } int main(int argc,char** argv){ string s;int i; if(argc==1) ios::sync_with_stdio(false), cin.tie(0); FOR(i,argc-1) s+=argv[i+1],s+='\n'; FOR(i,s.size()) ungetc(s[s.size()-1-i],stdin); cout.tie(0); solve(); return 0; }
Submission Info
Submission Time | |
---|---|
Task | J - 123 Pairs |
User | kmjp |
Language | C++14 (GCC 5.4.1) |
Score | 1500 |
Code Size | 1552 Byte |
Status | AC |
Exec Time | 112 ms |
Memory | 9600 KB |
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 1500 / 1500 | ||||
Status |
|
|
Set Name | Test Cases |
---|---|
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 | 65 ms | 9600 KB |
001.txt | AC | 23 ms | 9600 KB |
002.txt | AC | 23 ms | 9600 KB |
003.txt | AC | 23 ms | 9600 KB |
004.txt | AC | 23 ms | 9600 KB |
005.txt | AC | 23 ms | 9600 KB |
006.txt | AC | 23 ms | 9600 KB |
007.txt | AC | 23 ms | 9600 KB |
008.txt | AC | 23 ms | 9600 KB |
009.txt | AC | 23 ms | 9600 KB |
010.txt | AC | 23 ms | 9600 KB |
011.txt | AC | 23 ms | 9600 KB |
012.txt | AC | 23 ms | 9600 KB |
013.txt | AC | 23 ms | 9600 KB |
014.txt | AC | 23 ms | 9600 KB |
015.txt | AC | 92 ms | 9600 KB |
016.txt | AC | 28 ms | 9600 KB |
017.txt | AC | 42 ms | 9600 KB |
018.txt | AC | 27 ms | 9600 KB |
019.txt | AC | 46 ms | 9600 KB |
020.txt | AC | 30 ms | 9600 KB |
021.txt | AC | 83 ms | 9600 KB |
022.txt | AC | 29 ms | 9600 KB |
023.txt | AC | 36 ms | 9600 KB |
024.txt | AC | 84 ms | 9600 KB |
025.txt | AC | 33 ms | 9600 KB |
026.txt | AC | 58 ms | 9600 KB |
027.txt | AC | 79 ms | 9600 KB |
028.txt | AC | 44 ms | 9600 KB |
029.txt | AC | 50 ms | 9600 KB |
030.txt | AC | 79 ms | 9600 KB |
031.txt | AC | 85 ms | 9600 KB |
032.txt | AC | 28 ms | 9600 KB |
033.txt | AC | 36 ms | 9600 KB |
034.txt | AC | 46 ms | 9600 KB |
035.txt | AC | 53 ms | 9600 KB |
036.txt | AC | 28 ms | 9600 KB |
037.txt | AC | 23 ms | 9600 KB |
038.txt | AC | 112 ms | 9600 KB |
039.txt | AC | 35 ms | 9600 KB |
040.txt | AC | 32 ms | 9600 KB |
041.txt | AC | 38 ms | 9600 KB |
042.txt | AC | 24 ms | 9600 KB |
043.txt | AC | 23 ms | 9600 KB |
044.txt | AC | 23 ms | 9600 KB |
045.txt | AC | 23 ms | 9600 KB |
046.txt | AC | 23 ms | 9600 KB |
047.txt | AC | 23 ms | 9600 KB |
048.txt | AC | 23 ms | 9600 KB |
049.txt | AC | 23 ms | 9600 KB |
example0.txt | AC | 23 ms | 9600 KB |
example1.txt | AC | 24 ms | 9600 KB |