Submission #6205077
Source Code Expand
#include<iostream> #include<cstdio> #include<cstdlib> #include<cstring> #include<cmath> #include<algorithm> #include<vector> #include<set> #include<map> #include<unordered_map> using namespace std; #define ri register int #define il inline #define pb emplace_back #define solid const auto & #define enter putchar('\n') #define Size(x) ((int)x.size()) #define mem(x,y) memset(x,y,sizeof(x)) #define gm int mid((l+r)>>1) #define mp make_pair #define fi first #define se second typedef long long LL; typedef unsigned long long ull; typedef pair<int,int> pii; template<class T>il void in(T &x) { x=0; char c=getchar(); bool f=0; while(!isdigit(c)) f|=(c=='-'),c=getchar(); while(isdigit(c)) x=x*10+(c^'0'),c=getchar(); f?x=-x:0; } template<class T>il void out(T x,const char c='\n') { static short st[30]; short tp=0; if(x<0) putchar('-'),x=-x; do st[++tp]=x%10,x/=10; while(x); while(tp) putchar('0'|st[tp--]); putchar(c); } template<class T>il void err(const T &x,const char c='\n') {cerr<<x<<c;} template<class T,class ...Args>il void err(const T &x,const Args &...args) {err(x,' '),err(args...);} const int md=998244353; il int qpow(int a,int b) {int r=1; for(; b; b>>=1,a=(LL)a*a%md) if(b&1) r=(LL)r*a%md; return r;} il int fit(const int x) {return x>=md?x-md:x;} namespace i207M { const int N=1000005; int fac[N],ifac[N]; void prework(int n) { fac[0]=1; for(ri i=1;i<=n;++i) fac[i]=(LL)fac[i-1]*i%md; ifac[n]=qpow(fac[n],md-2); for(ri i=n;i>=1;--i) ifac[i-1]=(LL)ifac[i]*i%md; } il int C(int n,int m) {return (LL)fac[n]*ifac[m]%md*ifac[n-m]%md;} int n,m; signed main() { #ifdef M207 freopen("in.in","r",stdin); #endif in(n),in(m); if(n>m) swap(n,m); prework(n+m); int ans=0; for(ri i=1;i<=n;++i) ans=(ans+(LL)C(2*i,i)*C(n-i+m-i,n-i))%md; ans=(LL)ans*qpow(C(n+m,n),md-2)%md*(md+1)/2%md; ans=fit(ans+m); out(ans); return 0; } } signed main() { i207M::main(); return 0; }
Submission Info
Submission Time | |
---|---|
Task | F - Yes or No |
User | luogu_bot5 |
Language | C++14 (GCC 5.4.1) |
Score | 2000 |
Code Size | 1898 Byte |
Status | AC |
Exec Time | 17 ms |
Memory | 8064 KB |
Judge Result
Set Name | Sample | Partial | All | ||||||
---|---|---|---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 1500 / 1500 | 500 / 500 | ||||||
Status |
|
|
|
Set Name | Test Cases |
---|---|
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 | 1 ms | 2304 KB |
sample_02.txt | AC | 1 ms | 2304 KB |
sample_03.txt | AC | 2 ms | 2304 KB |
sample_04.txt | AC | 1 ms | 2304 KB |
sample_05.txt | AC | 1 ms | 2304 KB |
subtask_1_01.txt | AC | 1 ms | 2304 KB |
subtask_1_02.txt | AC | 1 ms | 2304 KB |
subtask_1_03.txt | AC | 1 ms | 2304 KB |
subtask_1_04.txt | AC | 1 ms | 2304 KB |
subtask_1_05.txt | AC | 1 ms | 2304 KB |
subtask_1_06.txt | AC | 1 ms | 2304 KB |
subtask_1_07.txt | AC | 1 ms | 2304 KB |
subtask_1_08.txt | AC | 1 ms | 2304 KB |
subtask_1_09.txt | AC | 1 ms | 2304 KB |
subtask_1_10.txt | AC | 1 ms | 2304 KB |
subtask_1_11.txt | AC | 1 ms | 2304 KB |
subtask_1_12.txt | AC | 1 ms | 2304 KB |
subtask_1_13.txt | AC | 2 ms | 2432 KB |
subtask_1_14.txt | AC | 3 ms | 4608 KB |
subtask_1_15.txt | AC | 5 ms | 5120 KB |
subtask_1_16.txt | AC | 5 ms | 5120 KB |
subtask_1_17.txt | AC | 5 ms | 5120 KB |
subtask_1_18.txt | AC | 5 ms | 5120 KB |
subtask_1_19.txt | AC | 5 ms | 5120 KB |
subtask_1_20.txt | AC | 5 ms | 5120 KB |
subtask_1_21.txt | AC | 5 ms | 5120 KB |
subtask_1_22.txt | AC | 5 ms | 5120 KB |
subtask_1_23.txt | AC | 5 ms | 5120 KB |
subtask_1_24.txt | AC | 5 ms | 4992 KB |
subtask_1_25.txt | AC | 4 ms | 4992 KB |
subtask_2_01.txt | AC | 1 ms | 2304 KB |
subtask_2_02.txt | AC | 1 ms | 2304 KB |
subtask_2_03.txt | AC | 1 ms | 2304 KB |
subtask_2_04.txt | AC | 16 ms | 8064 KB |
subtask_2_05.txt | AC | 17 ms | 8064 KB |
subtask_2_06.txt | AC | 17 ms | 8064 KB |
subtask_2_07.txt | AC | 17 ms | 8064 KB |
subtask_2_08.txt | AC | 17 ms | 8064 KB |
subtask_2_09.txt | AC | 17 ms | 8064 KB |
subtask_2_10.txt | AC | 16 ms | 8064 KB |
subtask_2_11.txt | AC | 17 ms | 8064 KB |
subtask_2_12.txt | AC | 17 ms | 8064 KB |
subtask_2_13.txt | AC | 17 ms | 8064 KB |
subtask_2_14.txt | AC | 17 ms | 8064 KB |
subtask_2_15.txt | AC | 17 ms | 8064 KB |
subtask_2_16.txt | AC | 17 ms | 8064 KB |
subtask_2_17.txt | AC | 16 ms | 8064 KB |
subtask_2_18.txt | AC | 15 ms | 7680 KB |
subtask_2_19.txt | AC | 13 ms | 7168 KB |
subtask_2_20.txt | AC | 7 ms | 6272 KB |
subtask_2_21.txt | AC | 7 ms | 6272 KB |
subtask_2_22.txt | AC | 7 ms | 6272 KB |
subtask_2_23.txt | AC | 7 ms | 6272 KB |
subtask_2_24.txt | AC | 7 ms | 6272 KB |
subtask_2_25.txt | AC | 7 ms | 6272 KB |
subtask_2_26.txt | AC | 7 ms | 6272 KB |
subtask_2_27.txt | AC | 7 ms | 6272 KB |
subtask_2_28.txt | AC | 7 ms | 6272 KB |
subtask_2_29.txt | AC | 8 ms | 6400 KB |
subtask_2_30.txt | AC | 9 ms | 6528 KB |
subtask_2_31.txt | AC | 11 ms | 6912 KB |
subtask_2_32.txt | AC | 17 ms | 8064 KB |
subtask_2_33.txt | AC | 17 ms | 8064 KB |
subtask_2_34.txt | AC | 17 ms | 8064 KB |
subtask_2_35.txt | AC | 17 ms | 8064 KB |
subtask_2_36.txt | AC | 17 ms | 8064 KB |
subtask_2_37.txt | AC | 9 ms | 6272 KB |
subtask_2_38.txt | AC | 7 ms | 5888 KB |
subtask_2_39.txt | AC | 16 ms | 7936 KB |
subtask_2_40.txt | AC | 9 ms | 6400 KB |