Submission #2875066
Source Code Expand
#include<cstdio> #include<algorithm> using namespace std; const int N=1000005,P=998244353; int n,m,f[N],rf[N]; int pw(int a,int x) { int ans=1; for(;x;x>>=1,a=1ll*a*a%P) if(x&1)ans=1ll*ans*a%P; return ans; } int C(int n,int m) { return 1ll*f[n]*rf[m]%P*rf[n-m]%P; } int main() { scanf("%d%d",&n,&m); if(n<m)swap(n,m); for(int i=f[0]=1;i<=n+m;i++)f[i]=1ll*f[i-1]*i%P; rf[n+m]=pw(f[n+m],P-2); for(int i=n+m;i;i--)rf[i-1]=1ll*rf[i]*i%P; int ans=n; for(int i=1;i<=m;i++) ans=(ans+1ll*C(2*i,i)*C(n+m-2*i,n-i)%P*pw(2*C(n+m,n),P-2))%P; printf("%d\n",ans); return 0; }
Submission Info
Submission Time | |
---|---|
Task | F - Yes or No |
User | luogu_bot2 |
Language | C++14 (GCC 5.4.1) |
Score | 2000 |
Code Size | 582 Byte |
Status | AC |
Exec Time | 91 ms |
Memory | 7936 KB |
Compile Error
./Main.cpp: In function ‘int main()’: ./Main.cpp:23:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^
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 | 1 ms | 2176 KB |
sample_02.txt | AC | 1 ms | 2176 KB |
sample_03.txt | AC | 1 ms | 2176 KB |
sample_04.txt | AC | 1 ms | 2176 KB |
sample_05.txt | AC | 1 ms | 2176 KB |
subtask_1_01.txt | AC | 1 ms | 2176 KB |
subtask_1_02.txt | AC | 1 ms | 2176 KB |
subtask_1_03.txt | AC | 1 ms | 2176 KB |
subtask_1_04.txt | AC | 1 ms | 2176 KB |
subtask_1_05.txt | AC | 1 ms | 2176 KB |
subtask_1_06.txt | AC | 1 ms | 2176 KB |
subtask_1_07.txt | AC | 1 ms | 2176 KB |
subtask_1_08.txt | AC | 1 ms | 2176 KB |
subtask_1_09.txt | AC | 1 ms | 2176 KB |
subtask_1_10.txt | AC | 1 ms | 2176 KB |
subtask_1_11.txt | AC | 1 ms | 2176 KB |
subtask_1_12.txt | AC | 1 ms | 2176 KB |
subtask_1_13.txt | AC | 2 ms | 2304 KB |
subtask_1_14.txt | AC | 6 ms | 4480 KB |
subtask_1_15.txt | AC | 19 ms | 4992 KB |
subtask_1_16.txt | AC | 19 ms | 4992 KB |
subtask_1_17.txt | AC | 19 ms | 4992 KB |
subtask_1_18.txt | AC | 19 ms | 4992 KB |
subtask_1_19.txt | AC | 19 ms | 4992 KB |
subtask_1_20.txt | AC | 19 ms | 4992 KB |
subtask_1_21.txt | AC | 19 ms | 4992 KB |
subtask_1_22.txt | AC | 19 ms | 4992 KB |
subtask_1_23.txt | AC | 19 ms | 4992 KB |
subtask_1_24.txt | AC | 17 ms | 4992 KB |
subtask_1_25.txt | AC | 17 ms | 4992 KB |
subtask_2_01.txt | AC | 1 ms | 2176 KB |
subtask_2_02.txt | AC | 1 ms | 2176 KB |
subtask_2_03.txt | AC | 1 ms | 2176 KB |
subtask_2_04.txt | AC | 91 ms | 7936 KB |
subtask_2_05.txt | AC | 91 ms | 7936 KB |
subtask_2_06.txt | AC | 91 ms | 7936 KB |
subtask_2_07.txt | AC | 91 ms | 7936 KB |
subtask_2_08.txt | AC | 91 ms | 7936 KB |
subtask_2_09.txt | AC | 91 ms | 7936 KB |
subtask_2_10.txt | AC | 91 ms | 7936 KB |
subtask_2_11.txt | AC | 91 ms | 7936 KB |
subtask_2_12.txt | AC | 91 ms | 7936 KB |
subtask_2_13.txt | AC | 91 ms | 7936 KB |
subtask_2_14.txt | AC | 91 ms | 7936 KB |
subtask_2_15.txt | AC | 91 ms | 7936 KB |
subtask_2_16.txt | AC | 91 ms | 7936 KB |
subtask_2_17.txt | AC | 89 ms | 7936 KB |
subtask_2_18.txt | AC | 82 ms | 7680 KB |
subtask_2_19.txt | AC | 71 ms | 7168 KB |
subtask_2_20.txt | AC | 6 ms | 6272 KB |
subtask_2_21.txt | AC | 6 ms | 6272 KB |
subtask_2_22.txt | AC | 6 ms | 6272 KB |
subtask_2_23.txt | AC | 6 ms | 6272 KB |
subtask_2_24.txt | AC | 6 ms | 6272 KB |
subtask_2_25.txt | AC | 6 ms | 6272 KB |
subtask_2_26.txt | AC | 6 ms | 6272 KB |
subtask_2_27.txt | AC | 7 ms | 6272 KB |
subtask_2_28.txt | AC | 8 ms | 6272 KB |
subtask_2_29.txt | AC | 10 ms | 6272 KB |
subtask_2_30.txt | AC | 23 ms | 6400 KB |
subtask_2_31.txt | AC | 40 ms | 6784 KB |
subtask_2_32.txt | AC | 91 ms | 7936 KB |
subtask_2_33.txt | AC | 91 ms | 7936 KB |
subtask_2_34.txt | AC | 91 ms | 7936 KB |
subtask_2_35.txt | AC | 89 ms | 7936 KB |
subtask_2_36.txt | AC | 89 ms | 7936 KB |
subtask_2_37.txt | AC | 39 ms | 6144 KB |
subtask_2_38.txt | AC | 14 ms | 5888 KB |
subtask_2_39.txt | AC | 84 ms | 7808 KB |
subtask_2_40.txt | AC | 21 ms | 6400 KB |