Submission #4727357
Source Code Expand
#include <bits/stdc++.h> using namespace std; typedef long long ll; const int N=1e6+9; const ll mod = 998244353; inline int read(){ int X=0;char ch=0; while(!isdigit(ch)) ch=getchar(); while(isdigit(ch)) X=(X<<3)+(X<<1)+(ch^48),ch=getchar(); return X; } ll inv(ll a){ ll d=1, n = mod-2; while(n){ if(n&1) d = d * a % mod; a = a * a % mod; n >>= 1; } return d; } ll gcd(ll a,ll b){ return b? gcd(b, a%b): a; } int n,m; ll h[1234][1234]; ll fac[N]; ll C(int n, int m){ return fac[n] * inv(fac[m]) % mod * inv(fac[n-m]) % mod; } int main() { n=read(), m=read(); if(n>m) swap(n,m); fac[0] = 1; for(int i=1; i<=n+m+n; i++) fac[i] = fac[i-1] * i % mod; ll ans=0; for(int i = 1; i <= n; i++) ans = (ans + C(i*2 ,i) * C(n+m-i-i, n-i) %mod) %mod; ans = ((ll)m + ans * inv(C(n+m, n)) % mod * inv(2) % mod) % mod; printf("%lld\n", ans); }
Submission Info
Submission Time | |
---|---|
Task | F - Yes or No |
User | luogu_bot2 |
Language | C++14 (GCC 5.4.1) |
Score | 2000 |
Code Size | 923 Byte |
Status | AC |
Exec Time | 329 ms |
Memory | 12544 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 | 1 ms | 256 KB |
sample_02.txt | AC | 1 ms | 256 KB |
sample_03.txt | AC | 1 ms | 256 KB |
sample_04.txt | AC | 1 ms | 256 KB |
sample_05.txt | AC | 1 ms | 256 KB |
subtask_1_01.txt | AC | 1 ms | 256 KB |
subtask_1_02.txt | AC | 1 ms | 256 KB |
subtask_1_03.txt | AC | 1 ms | 256 KB |
subtask_1_04.txt | AC | 1 ms | 256 KB |
subtask_1_05.txt | AC | 1 ms | 256 KB |
subtask_1_06.txt | AC | 1 ms | 256 KB |
subtask_1_07.txt | AC | 1 ms | 256 KB |
subtask_1_08.txt | AC | 1 ms | 256 KB |
subtask_1_09.txt | AC | 1 ms | 256 KB |
subtask_1_10.txt | AC | 1 ms | 256 KB |
subtask_1_11.txt | AC | 2 ms | 256 KB |
subtask_1_12.txt | AC | 3 ms | 256 KB |
subtask_1_13.txt | AC | 8 ms | 512 KB |
subtask_1_14.txt | AC | 21 ms | 896 KB |
subtask_1_15.txt | AC | 67 ms | 4352 KB |
subtask_1_16.txt | AC | 67 ms | 4352 KB |
subtask_1_17.txt | AC | 67 ms | 4352 KB |
subtask_1_18.txt | AC | 67 ms | 4352 KB |
subtask_1_19.txt | AC | 67 ms | 4352 KB |
subtask_1_20.txt | AC | 67 ms | 4352 KB |
subtask_1_21.txt | AC | 67 ms | 4352 KB |
subtask_1_22.txt | AC | 67 ms | 4352 KB |
subtask_1_23.txt | AC | 67 ms | 4352 KB |
subtask_1_24.txt | AC | 62 ms | 4352 KB |
subtask_1_25.txt | AC | 60 ms | 4352 KB |
subtask_2_01.txt | AC | 1 ms | 256 KB |
subtask_2_02.txt | AC | 1 ms | 256 KB |
subtask_2_03.txt | AC | 1 ms | 256 KB |
subtask_2_04.txt | AC | 329 ms | 12544 KB |
subtask_2_05.txt | AC | 329 ms | 12544 KB |
subtask_2_06.txt | AC | 329 ms | 12544 KB |
subtask_2_07.txt | AC | 329 ms | 12544 KB |
subtask_2_08.txt | AC | 328 ms | 12544 KB |
subtask_2_09.txt | AC | 328 ms | 12544 KB |
subtask_2_10.txt | AC | 328 ms | 12544 KB |
subtask_2_11.txt | AC | 328 ms | 12544 KB |
subtask_2_12.txt | AC | 328 ms | 12544 KB |
subtask_2_13.txt | AC | 329 ms | 12544 KB |
subtask_2_14.txt | AC | 328 ms | 12544 KB |
subtask_2_15.txt | AC | 328 ms | 12544 KB |
subtask_2_16.txt | AC | 328 ms | 12544 KB |
subtask_2_17.txt | AC | 324 ms | 12544 KB |
subtask_2_18.txt | AC | 297 ms | 12544 KB |
subtask_2_19.txt | AC | 255 ms | 10496 KB |
subtask_2_20.txt | AC | 5 ms | 4352 KB |
subtask_2_21.txt | AC | 4 ms | 4352 KB |
subtask_2_22.txt | AC | 5 ms | 4352 KB |
subtask_2_23.txt | AC | 5 ms | 4352 KB |
subtask_2_24.txt | AC | 5 ms | 4352 KB |
subtask_2_25.txt | AC | 5 ms | 4352 KB |
subtask_2_26.txt | AC | 5 ms | 4352 KB |
subtask_2_27.txt | AC | 6 ms | 4352 KB |
subtask_2_28.txt | AC | 11 ms | 4352 KB |
subtask_2_29.txt | AC | 18 ms | 6400 KB |
subtask_2_30.txt | AC | 69 ms | 6400 KB |
subtask_2_31.txt | AC | 134 ms | 8448 KB |
subtask_2_32.txt | AC | 328 ms | 12544 KB |
subtask_2_33.txt | AC | 328 ms | 12544 KB |
subtask_2_34.txt | AC | 328 ms | 12544 KB |
subtask_2_35.txt | AC | 322 ms | 12544 KB |
subtask_2_36.txt | AC | 320 ms | 12544 KB |
subtask_2_37.txt | AC | 137 ms | 6400 KB |
subtask_2_38.txt | AC | 41 ms | 4352 KB |
subtask_2_39.txt | AC | 302 ms | 12544 KB |
subtask_2_40.txt | AC | 62 ms | 6400 KB |