Submission #2975844
Source Code Expand
#include<bits/stdc++.h> using namespace std; typedef long long ll; #define MOD 1000000007 //a^(p-2)=a^(-1) (mod p) //(x^n)%mod ll mod_pow(ll x,ll n,ll mod){ if(n==0)return 1; ll res=mod_pow(x*x%mod,n/2,mod); if(n&1)res=res*x%mod; return res; } ll nHr(ll n,ll r){ ll d[222222]; ll inv[222222]; d[0]=d[1]=1; for(ll i=1;i<=n-1+r;i++){ d[i]=(d[i-1]*i)%MOD; inv[i]=mod_pow(d[i],MOD-2,MOD); } // cout<<d[n-1+r]<<" "<<inv[r]<<" "<<inv[n-1]<<endl; return (((d[n-1+r]*inv[r])%MOD)*inv[n-1])%MOD; } int main(){ ll n,k; cin>>n>>k; cout<<nHr(n,k)<<endl; return 0; }
Submission Info
Submission Time | |
---|---|
Task | D - 多重ループ |
User | shake |
Language | C++14 (GCC 5.4.1) |
Score | 0 |
Code Size | 625 Byte |
Status | WA |
Exec Time | 121 ms |
Memory | 3328 KB |
Judge Result
Set Name | Sample | Subtask1 | All | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 0 / 99 | 0 / 1 | ||||||||||
Status |
|
|
|
Set Name | Test Cases |
---|---|
Sample | subtask0_sample_01.txt, subtask0_sample_02.txt, subtask0_sample_03.txt, subtask0_sample_04.txt, subtask0_sample_05.txt |
Subtask1 | subtask0_sample_01.txt, subtask0_sample_02.txt, subtask0_sample_03.txt, subtask0_sample_04.txt, subtask1_01.txt, subtask1_02.txt, subtask1_03.txt, subtask1_04.txt, subtask1_05.txt, subtask1_06.txt, subtask1_07.txt, subtask1_08.txt, subtask1_09.txt, subtask1_10.txt, subtask1_11.txt, subtask1_12.txt, subtask1_13.txt, subtask1_14.txt, subtask1_15.txt, subtask1_16.txt, subtask1_17.txt, subtask1_18.txt, subtask1_19.txt |
All | subtask0_sample_01.txt, subtask0_sample_02.txt, subtask0_sample_03.txt, subtask0_sample_04.txt, subtask0_sample_05.txt, subtask1_01.txt, subtask1_02.txt, subtask1_03.txt, subtask1_04.txt, subtask1_05.txt, subtask1_06.txt, subtask1_07.txt, subtask1_08.txt, subtask1_09.txt, subtask1_10.txt, subtask1_11.txt, subtask1_12.txt, subtask1_13.txt, subtask1_14.txt, subtask1_15.txt, subtask1_16.txt, subtask1_17.txt, subtask1_18.txt, subtask1_19.txt, subtask2_02.txt, subtask2_03.txt, subtask2_04.txt, subtask2_05.txt, subtask2_06.txt, subtask2_07.txt, subtask2_08.txt, subtask2_09.txt, subtask2_10.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
subtask0_sample_01.txt | AC | 2 ms | 2304 KB |
subtask0_sample_02.txt | AC | 2 ms | 2304 KB |
subtask0_sample_03.txt | AC | 1 ms | 256 KB |
subtask0_sample_04.txt | AC | 2 ms | 256 KB |
subtask0_sample_05.txt | AC | 121 ms | 3328 KB |
subtask1_01.txt | AC | 1 ms | 256 KB |
subtask1_02.txt | AC | 2 ms | 2304 KB |
subtask1_03.txt | AC | 2 ms | 2304 KB |
subtask1_04.txt | AC | 2 ms | 2304 KB |
subtask1_05.txt | AC | 2 ms | 256 KB |
subtask1_06.txt | AC | 2 ms | 2304 KB |
subtask1_07.txt | AC | 2 ms | 2304 KB |
subtask1_08.txt | AC | 2 ms | 256 KB |
subtask1_09.txt | AC | 2 ms | 2304 KB |
subtask1_10.txt | AC | 2 ms | 256 KB |
subtask1_11.txt | AC | 2 ms | 256 KB |
subtask1_12.txt | AC | 2 ms | 2304 KB |
subtask1_13.txt | AC | 2 ms | 256 KB |
subtask1_14.txt | AC | 2 ms | 2304 KB |
subtask1_15.txt | AC | 2 ms | 256 KB |
subtask1_16.txt | AC | 2 ms | 2304 KB |
subtask1_17.txt | AC | 2 ms | 256 KB |
subtask1_18.txt | WA | 2 ms | 256 KB |
subtask1_19.txt | AC | 3 ms | 2304 KB |
subtask2_02.txt | AC | 46 ms | 2560 KB |
subtask2_03.txt | AC | 78 ms | 2304 KB |
subtask2_04.txt | AC | 38 ms | 2816 KB |
subtask2_05.txt | AC | 97 ms | 3200 KB |
subtask2_06.txt | AC | 20 ms | 2560 KB |
subtask2_07.txt | AC | 61 ms | 1792 KB |
subtask2_08.txt | AC | 91 ms | 2560 KB |
subtask2_09.txt | WA | 61 ms | 3072 KB |
subtask2_10.txt | AC | 121 ms | 3328 KB |