Submission #1540833
Source Code Expand
#include <bits/stdc++.h> #define MOD 998244353 #define MAXT 1100000 using namespace std; typedef long long LL; LL powmod(LL a, LL n){ if(n == 0) return 1; if(n % 2) return (a * powmod(a,n-1)) % MOD; return powmod((a*a) % MOD,n/2); } LL inv(LL a){ return powmod(a,MOD-2); } LL fact[MAXT]; LL invfact[MAXT]; int main(){ for(int i = 0; i < MAXT; i++){ if(i == 0){ fact[i] = 1; continue; } fact[i] = (i*fact[i-1]) % MOD; } invfact[MAXT-1] = inv(fact[MAXT-1]); for(LL j = MAXT-2; j >= 0; j--){ invfact[j] = ((j+1) * invfact[j+1]) % MOD; } LL n, m; cin >> n >> m; if(n < m) swap(n,m); LL ans = n; LL sum = 0; LL cur = 0; for(LL i = 2; i <= n + m; i += 2){ LL k = i/2; if(n < k || m < k) continue; LL v = 1; v = (v * fact[2*k]) % MOD; v = (v * invfact[k]) % MOD; v = (v * invfact[k]) % MOD; v = (v * fact[m+n-2*k]) % MOD; v = (v * invfact[n-k]) % MOD; v = (v * invfact[m-k]) % MOD; sum += v; sum %= MOD; } sum = (sum * invfact[2]) % MOD; sum = (sum * invfact[m+n]) % MOD; sum = (sum * fact[m]) % MOD; sum = (sum * fact[n]) % MOD; ans += sum; ans %= MOD; while(ans < 0) ans += MOD; cout << ans << endl; }
Submission Info
Submission Time | |
---|---|
Task | F - Yes or No |
User | ksun48 |
Language | C++14 (GCC 5.4.1) |
Score | 2000 |
Code Size | 1219 Byte |
Status | AC |
Exec Time | 26 ms |
Memory | 17408 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 | 18 ms | 17408 KB |
sample_02.txt | AC | 18 ms | 17408 KB |
sample_03.txt | AC | 18 ms | 17408 KB |
sample_04.txt | AC | 18 ms | 17408 KB |
sample_05.txt | AC | 18 ms | 17408 KB |
subtask_1_01.txt | AC | 18 ms | 17408 KB |
subtask_1_02.txt | AC | 18 ms | 17408 KB |
subtask_1_03.txt | AC | 18 ms | 17408 KB |
subtask_1_04.txt | AC | 18 ms | 17408 KB |
subtask_1_05.txt | AC | 18 ms | 17408 KB |
subtask_1_06.txt | AC | 18 ms | 17408 KB |
subtask_1_07.txt | AC | 18 ms | 17408 KB |
subtask_1_08.txt | AC | 18 ms | 17408 KB |
subtask_1_09.txt | AC | 18 ms | 17408 KB |
subtask_1_10.txt | AC | 18 ms | 17408 KB |
subtask_1_11.txt | AC | 18 ms | 17408 KB |
subtask_1_12.txt | AC | 18 ms | 17408 KB |
subtask_1_13.txt | AC | 18 ms | 17408 KB |
subtask_1_14.txt | AC | 19 ms | 17408 KB |
subtask_1_15.txt | AC | 20 ms | 17408 KB |
subtask_1_16.txt | AC | 20 ms | 17408 KB |
subtask_1_17.txt | AC | 20 ms | 17408 KB |
subtask_1_18.txt | AC | 20 ms | 17408 KB |
subtask_1_19.txt | AC | 20 ms | 17408 KB |
subtask_1_20.txt | AC | 20 ms | 17408 KB |
subtask_1_21.txt | AC | 20 ms | 17408 KB |
subtask_1_22.txt | AC | 20 ms | 17408 KB |
subtask_1_23.txt | AC | 20 ms | 17408 KB |
subtask_1_24.txt | AC | 20 ms | 17408 KB |
subtask_1_25.txt | AC | 19 ms | 17408 KB |
subtask_2_01.txt | AC | 18 ms | 17408 KB |
subtask_2_02.txt | AC | 18 ms | 17408 KB |
subtask_2_03.txt | AC | 18 ms | 17408 KB |
subtask_2_04.txt | AC | 26 ms | 17408 KB |
subtask_2_05.txt | AC | 26 ms | 17408 KB |
subtask_2_06.txt | AC | 26 ms | 17408 KB |
subtask_2_07.txt | AC | 26 ms | 17408 KB |
subtask_2_08.txt | AC | 26 ms | 17408 KB |
subtask_2_09.txt | AC | 26 ms | 17408 KB |
subtask_2_10.txt | AC | 26 ms | 17408 KB |
subtask_2_11.txt | AC | 26 ms | 17408 KB |
subtask_2_12.txt | AC | 26 ms | 17408 KB |
subtask_2_13.txt | AC | 26 ms | 17408 KB |
subtask_2_14.txt | AC | 26 ms | 17408 KB |
subtask_2_15.txt | AC | 26 ms | 17408 KB |
subtask_2_16.txt | AC | 26 ms | 17408 KB |
subtask_2_17.txt | AC | 26 ms | 17408 KB |
subtask_2_18.txt | AC | 25 ms | 17408 KB |
subtask_2_19.txt | AC | 24 ms | 17408 KB |
subtask_2_20.txt | AC | 18 ms | 17408 KB |
subtask_2_21.txt | AC | 18 ms | 17408 KB |
subtask_2_22.txt | AC | 18 ms | 17408 KB |
subtask_2_23.txt | AC | 18 ms | 17408 KB |
subtask_2_24.txt | AC | 18 ms | 17408 KB |
subtask_2_25.txt | AC | 18 ms | 17408 KB |
subtask_2_26.txt | AC | 18 ms | 17408 KB |
subtask_2_27.txt | AC | 18 ms | 17408 KB |
subtask_2_28.txt | AC | 18 ms | 17408 KB |
subtask_2_29.txt | AC | 19 ms | 17408 KB |
subtask_2_30.txt | AC | 20 ms | 17408 KB |
subtask_2_31.txt | AC | 21 ms | 17408 KB |
subtask_2_32.txt | AC | 26 ms | 17408 KB |
subtask_2_33.txt | AC | 26 ms | 17408 KB |
subtask_2_34.txt | AC | 26 ms | 17408 KB |
subtask_2_35.txt | AC | 26 ms | 17408 KB |
subtask_2_36.txt | AC | 26 ms | 17408 KB |
subtask_2_37.txt | AC | 21 ms | 17408 KB |
subtask_2_38.txt | AC | 19 ms | 17408 KB |
subtask_2_39.txt | AC | 26 ms | 17408 KB |
subtask_2_40.txt | AC | 20 ms | 17408 KB |