Submission #1996928
Source Code Expand
#include <cstdio> #include <cstring> #include <algorithm> #define P 998244353 using namespace std; typedef long long ll; ll powmod(ll x, ll y = P - 2, ll p = P) { ll ans = 1; while(y) { if(y & 1) ans = ans * x % p; x = x * x % p; y >>= 1; } return ans; } ll Fac[1000010], Rev[1000010], n, m; ll C(ll x, ll y) { if(x < 0 || y < 0 || x < y) return 0; return Fac[x] * Rev[y] % P * Rev[x - y] % P; } int main() { for(int i = 0; i <= 1000001; i++) Fac[i] = !i ? 1 : Fac[i - 1] * i % P; for(int i = 1000001; i >= 0; i--) Rev[i] = i == 1000001 ? powmod(Fac[i]) : Rev[i + 1] * (i + 1) % P; scanf("%lld%lld", &n, &m); ll f = C(n + m, m), g = f, ans = f; for(int i = 1; i < n + m; i++) { g = (g + (i % 2 == 1 ? -2 : 1) * C(i - 1, (i / 2)) * (C(n + m - (i % 2 == 1) - i, m - i + (i / 2)))) % P; ans = (ans + (f = (f + g) % P) * Rev[i + 1] % P * Fac[i]) % P; } printf("%lld\n", ((ans * powmod(C(n + m, m))) % P + P) % P); return 0; }
Submission Info
Submission Time | |
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Task | F - Yes or No |
User | lastans7 |
Language | C++14 (GCC 5.4.1) |
Score | 2000 |
Code Size | 1062 Byte |
Status | AC |
Exec Time | 38 ms |
Memory | 15872 KB |
Compile Error
./Main.cpp: In function ‘int main()’: ./Main.cpp:30:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld", &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 | 16 ms | 15744 KB |
sample_02.txt | AC | 16 ms | 15744 KB |
sample_03.txt | AC | 16 ms | 15744 KB |
sample_04.txt | AC | 16 ms | 15744 KB |
sample_05.txt | AC | 16 ms | 15744 KB |
subtask_1_01.txt | AC | 16 ms | 15872 KB |
subtask_1_02.txt | AC | 16 ms | 15744 KB |
subtask_1_03.txt | AC | 16 ms | 15744 KB |
subtask_1_04.txt | AC | 16 ms | 15744 KB |
subtask_1_05.txt | AC | 16 ms | 15744 KB |
subtask_1_06.txt | AC | 16 ms | 15744 KB |
subtask_1_07.txt | AC | 16 ms | 15744 KB |
subtask_1_08.txt | AC | 16 ms | 15744 KB |
subtask_1_09.txt | AC | 16 ms | 15744 KB |
subtask_1_10.txt | AC | 16 ms | 15744 KB |
subtask_1_11.txt | AC | 16 ms | 15744 KB |
subtask_1_12.txt | AC | 16 ms | 15744 KB |
subtask_1_13.txt | AC | 16 ms | 15744 KB |
subtask_1_14.txt | AC | 17 ms | 15744 KB |
subtask_1_15.txt | AC | 20 ms | 15744 KB |
subtask_1_16.txt | AC | 21 ms | 15744 KB |
subtask_1_17.txt | AC | 21 ms | 15744 KB |
subtask_1_18.txt | AC | 20 ms | 15744 KB |
subtask_1_19.txt | AC | 20 ms | 15744 KB |
subtask_1_20.txt | AC | 20 ms | 15744 KB |
subtask_1_21.txt | AC | 20 ms | 15744 KB |
subtask_1_22.txt | AC | 20 ms | 15744 KB |
subtask_1_23.txt | AC | 20 ms | 15744 KB |
subtask_1_24.txt | AC | 20 ms | 15744 KB |
subtask_1_25.txt | AC | 20 ms | 15744 KB |
subtask_2_01.txt | AC | 16 ms | 15744 KB |
subtask_2_02.txt | AC | 16 ms | 15744 KB |
subtask_2_03.txt | AC | 16 ms | 15744 KB |
subtask_2_04.txt | AC | 38 ms | 15744 KB |
subtask_2_05.txt | AC | 38 ms | 15744 KB |
subtask_2_06.txt | AC | 38 ms | 15744 KB |
subtask_2_07.txt | AC | 38 ms | 15744 KB |
subtask_2_08.txt | AC | 38 ms | 15744 KB |
subtask_2_09.txt | AC | 38 ms | 15744 KB |
subtask_2_10.txt | AC | 38 ms | 15744 KB |
subtask_2_11.txt | AC | 38 ms | 15744 KB |
subtask_2_12.txt | AC | 38 ms | 15744 KB |
subtask_2_13.txt | AC | 38 ms | 15744 KB |
subtask_2_14.txt | AC | 38 ms | 15744 KB |
subtask_2_15.txt | AC | 38 ms | 15744 KB |
subtask_2_16.txt | AC | 38 ms | 15744 KB |
subtask_2_17.txt | AC | 38 ms | 15744 KB |
subtask_2_18.txt | AC | 36 ms | 15744 KB |
subtask_2_19.txt | AC | 33 ms | 15744 KB |
subtask_2_20.txt | AC | 23 ms | 15744 KB |
subtask_2_21.txt | AC | 23 ms | 15872 KB |
subtask_2_22.txt | AC | 23 ms | 15744 KB |
subtask_2_23.txt | AC | 23 ms | 15744 KB |
subtask_2_24.txt | AC | 23 ms | 15744 KB |
subtask_2_25.txt | AC | 23 ms | 15744 KB |
subtask_2_26.txt | AC | 23 ms | 15744 KB |
subtask_2_27.txt | AC | 23 ms | 15744 KB |
subtask_2_28.txt | AC | 23 ms | 15744 KB |
subtask_2_29.txt | AC | 24 ms | 15744 KB |
subtask_2_30.txt | AC | 26 ms | 15744 KB |
subtask_2_31.txt | AC | 29 ms | 15744 KB |
subtask_2_32.txt | AC | 38 ms | 15744 KB |
subtask_2_33.txt | AC | 38 ms | 15744 KB |
subtask_2_34.txt | AC | 38 ms | 15744 KB |
subtask_2_35.txt | AC | 38 ms | 15744 KB |
subtask_2_36.txt | AC | 37 ms | 15744 KB |
subtask_2_37.txt | AC | 26 ms | 15744 KB |
subtask_2_38.txt | AC | 23 ms | 15744 KB |
subtask_2_39.txt | AC | 37 ms | 15744 KB |
subtask_2_40.txt | AC | 26 ms | 15744 KB |