Submission #1550733
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)) //------------------------------------------------------- int N,M; ll mo=998244353; ll modpow(ll a, ll n = mo-2) { ll r=1; while(n) r=r*((n%2)?a:1)%mo,a=a*a%mo,n>>=1; return r; } ll combi(ll N_, ll C_) { const int NUM_=1000005; static ll fact[NUM_+1],factr[NUM_+1],inv[NUM_+1]; 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_);} void solve() { int i,j,k,l,r,x,y; string s; cin>>N>>M; ll Q=modpow(combi(N+M,N)); ll P=0; for(i=N+M-2;i>=0;i-=2) { int left=(N+M-i)/2; ll a=combi(left*2,left); ll b=combi(N+M-left*2,N-left); (P += a*b)%=mo; } cout<<(P*modpow(2)%mo*Q+max(N,M))%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 | F - Yes or No |
User | kmjp |
Language | C++14 (GCC 5.4.1) |
Score | 2000 |
Code Size | 1598 Byte |
Status | AC |
Exec Time | 93 ms |
Memory | 23680 KB |
Judge Result
Set Name | Sample | Partial | All | ||||||
---|---|---|---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 1500 / 1500 | 500 / 500 | ||||||
Status |
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Set Name | Test Cases |
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Sample | sample_01.txt, sample_02.txt, sample_03.txt, sample_04.txt, sample_05.txt |
Partial | sample_01.txt, sample_02.txt, sample_04.txt, subtask_1_01.txt, subtask_1_02.txt, subtask_1_03.txt, subtask_1_04.txt, subtask_1_05.txt, subtask_1_06.txt, subtask_1_07.txt, subtask_1_08.txt, subtask_1_09.txt, subtask_1_10.txt, subtask_1_11.txt, subtask_1_12.txt, subtask_1_13.txt, subtask_1_14.txt, subtask_1_15.txt, subtask_1_16.txt, subtask_1_17.txt, subtask_1_18.txt, subtask_1_19.txt, subtask_1_20.txt, subtask_1_21.txt, subtask_1_22.txt, subtask_1_23.txt, subtask_1_24.txt, subtask_1_25.txt |
All | sample_01.txt, sample_02.txt, sample_03.txt, sample_04.txt, sample_05.txt, sample_01.txt, sample_02.txt, sample_03.txt, sample_04.txt, sample_05.txt, subtask_1_01.txt, subtask_1_02.txt, subtask_1_03.txt, subtask_1_04.txt, subtask_1_05.txt, subtask_1_06.txt, subtask_1_07.txt, subtask_1_08.txt, subtask_1_09.txt, subtask_1_10.txt, subtask_1_11.txt, subtask_1_12.txt, subtask_1_13.txt, subtask_1_14.txt, subtask_1_15.txt, subtask_1_16.txt, subtask_1_17.txt, subtask_1_18.txt, subtask_1_19.txt, subtask_1_20.txt, subtask_1_21.txt, subtask_1_22.txt, subtask_1_23.txt, subtask_1_24.txt, subtask_1_25.txt, subtask_2_01.txt, subtask_2_02.txt, subtask_2_03.txt, subtask_2_04.txt, subtask_2_05.txt, subtask_2_06.txt, subtask_2_07.txt, subtask_2_08.txt, subtask_2_09.txt, subtask_2_10.txt, subtask_2_11.txt, subtask_2_12.txt, subtask_2_13.txt, subtask_2_14.txt, subtask_2_15.txt, subtask_2_16.txt, subtask_2_17.txt, subtask_2_18.txt, subtask_2_19.txt, subtask_2_20.txt, subtask_2_21.txt, subtask_2_22.txt, subtask_2_23.txt, subtask_2_24.txt, subtask_2_25.txt, subtask_2_26.txt, subtask_2_27.txt, subtask_2_28.txt, subtask_2_29.txt, subtask_2_30.txt, subtask_2_31.txt, subtask_2_32.txt, subtask_2_33.txt, subtask_2_34.txt, subtask_2_35.txt, subtask_2_36.txt, subtask_2_37.txt, subtask_2_38.txt, subtask_2_39.txt, subtask_2_40.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
sample_01.txt | AC | 54 ms | 23680 KB |
sample_02.txt | AC | 54 ms | 23680 KB |
sample_03.txt | AC | 54 ms | 23680 KB |
sample_04.txt | AC | 54 ms | 23680 KB |
sample_05.txt | AC | 54 ms | 23680 KB |
subtask_1_01.txt | AC | 54 ms | 23680 KB |
subtask_1_02.txt | AC | 54 ms | 23680 KB |
subtask_1_03.txt | AC | 54 ms | 23680 KB |
subtask_1_04.txt | AC | 54 ms | 23680 KB |
subtask_1_05.txt | AC | 54 ms | 23680 KB |
subtask_1_06.txt | AC | 54 ms | 23680 KB |
subtask_1_07.txt | AC | 54 ms | 23680 KB |
subtask_1_08.txt | AC | 54 ms | 23680 KB |
subtask_1_09.txt | AC | 54 ms | 23680 KB |
subtask_1_10.txt | AC | 54 ms | 23680 KB |
subtask_1_11.txt | AC | 54 ms | 23680 KB |
subtask_1_12.txt | AC | 54 ms | 23680 KB |
subtask_1_13.txt | AC | 55 ms | 23680 KB |
subtask_1_14.txt | AC | 56 ms | 23680 KB |
subtask_1_15.txt | AC | 61 ms | 23680 KB |
subtask_1_16.txt | AC | 61 ms | 23680 KB |
subtask_1_17.txt | AC | 61 ms | 23680 KB |
subtask_1_18.txt | AC | 61 ms | 23680 KB |
subtask_1_19.txt | AC | 61 ms | 23680 KB |
subtask_1_20.txt | AC | 61 ms | 23680 KB |
subtask_1_21.txt | AC | 61 ms | 23680 KB |
subtask_1_22.txt | AC | 61 ms | 23680 KB |
subtask_1_23.txt | AC | 61 ms | 23680 KB |
subtask_1_24.txt | AC | 60 ms | 23680 KB |
subtask_1_25.txt | AC | 60 ms | 23680 KB |
subtask_2_01.txt | AC | 54 ms | 23680 KB |
subtask_2_02.txt | AC | 54 ms | 23680 KB |
subtask_2_03.txt | AC | 54 ms | 23680 KB |
subtask_2_04.txt | AC | 87 ms | 23680 KB |
subtask_2_05.txt | AC | 88 ms | 23680 KB |
subtask_2_06.txt | AC | 87 ms | 23680 KB |
subtask_2_07.txt | AC | 87 ms | 23680 KB |
subtask_2_08.txt | AC | 87 ms | 23680 KB |
subtask_2_09.txt | AC | 93 ms | 23680 KB |
subtask_2_10.txt | AC | 87 ms | 23680 KB |
subtask_2_11.txt | AC | 88 ms | 23680 KB |
subtask_2_12.txt | AC | 87 ms | 23680 KB |
subtask_2_13.txt | AC | 88 ms | 23680 KB |
subtask_2_14.txt | AC | 87 ms | 23680 KB |
subtask_2_15.txt | AC | 87 ms | 23680 KB |
subtask_2_16.txt | AC | 87 ms | 23680 KB |
subtask_2_17.txt | AC | 87 ms | 23680 KB |
subtask_2_18.txt | AC | 85 ms | 23680 KB |
subtask_2_19.txt | AC | 80 ms | 23680 KB |
subtask_2_20.txt | AC | 67 ms | 23680 KB |
subtask_2_21.txt | AC | 65 ms | 23680 KB |
subtask_2_22.txt | AC | 65 ms | 23680 KB |
subtask_2_23.txt | AC | 65 ms | 23680 KB |
subtask_2_24.txt | AC | 65 ms | 23680 KB |
subtask_2_25.txt | AC | 65 ms | 23680 KB |
subtask_2_26.txt | AC | 65 ms | 23680 KB |
subtask_2_27.txt | AC | 65 ms | 23680 KB |
subtask_2_28.txt | AC | 65 ms | 23680 KB |
subtask_2_29.txt | AC | 66 ms | 23680 KB |
subtask_2_30.txt | AC | 69 ms | 23680 KB |
subtask_2_31.txt | AC | 74 ms | 23680 KB |
subtask_2_32.txt | AC | 87 ms | 23680 KB |
subtask_2_33.txt | AC | 88 ms | 23680 KB |
subtask_2_34.txt | AC | 87 ms | 23680 KB |
subtask_2_35.txt | AC | 87 ms | 23680 KB |
subtask_2_36.txt | AC | 87 ms | 23680 KB |
subtask_2_37.txt | AC | 70 ms | 23680 KB |
subtask_2_38.txt | AC | 64 ms | 23680 KB |
subtask_2_39.txt | AC | 86 ms | 23680 KB |
subtask_2_40.txt | AC | 69 ms | 23680 KB |