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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#99683 | #6333. Festivals in JOI Kingdom 2 | chenshi | 87 | 215ms | 1880kb | C++ | 908b | 2023-04-23 14:50:24 | 2023-04-23 14:50:27 |
Judging History
answer
#include<cstdio>
using namespace std;
const int o=40010;
int n,p,fac[o],inv[o],f[o][2],ans=1;
inline int fix(int x){return x+(x>>31&p);}
int main(){
scanf("%d%d",&n,&p);inv[1]=1;
for(int i=2;i<=n*2;++i) inv[i]=p-p/i*1ll*inv[p%i]%p;
for(int i=fac[0]=inv[0]=1;i<=n*2;++i) fac[i]=fac[i-1]*1ll*i%p,inv[i]=inv[i-1]*1ll*inv[i]%p;
f[1][1]=f[2][0]=1;
for(int i=1;i<=n;++i){
for(int j=0,v=f[i][0],t;j<n-i&&v;++j)
t=v*(j+1ll)%p,f[i+j+2][0]=(f[i+j+2][0]+t*(j+2ll))%p,f[i+j+1][1]=fix(f[i+j+1][1]+t-p),v=v*(2*i-2ll+j)%p;
for(int j=0,v=f[i][1];j<n-i&&v;++j)
f[i+j+2][0]=(f[i+j+2][0]+v*(j+1ll))%p,f[i+j+1][1]=fix(f[i+j+1][1]+v-p),v=v*(2*i-1ll+j)%p;
}
for(int i=1;i<=n;++i) ans=ans*(2*i-1ll)%p;
for(int i=2;i<=n;++i) ans=(ans+(p-f[i][0])*(n-i+1ll)%p*fac[n+i-3]%p*inv[i*2-3])%p;
for(int i=1;i<=n;++i) ans=(ans+(p-f[i][1])*1ll*fac[n+i-2]%p*inv[i*2-2])%p;
printf("%d",ans);
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Subtask #1:
score: 5
Accepted
Test #1:
score: 5
Accepted
time: 1ms
memory: 1492kb
input:
1 194903119
output:
0
result:
ok 1 number(s): "0"
Test #2:
score: 0
Accepted
time: 1ms
memory: 1528kb
input:
2 933234047
output:
0
result:
ok 1 number(s): "0"
Test #3:
score: 0
Accepted
time: 1ms
memory: 1756kb
input:
3 277793111
output:
2
result:
ok 1 number(s): "2"
Test #4:
score: 0
Accepted
time: 0ms
memory: 1524kb
input:
4 355321177
output:
28
result:
ok 1 number(s): "28"
Test #5:
score: 0
Accepted
time: 1ms
memory: 1608kb
input:
5 306636893
output:
358
result:
ok 1 number(s): "358"
Subtask #2:
score: 5
Accepted
Dependency #1:
100%
Accepted
Test #6:
score: 5
Accepted
time: 1ms
memory: 1536kb
input:
8 361605653
output:
1236922
result:
ok 1 number(s): "1236922"
Test #7:
score: 0
Accepted
time: 1ms
memory: 1760kb
input:
8 995512643
output:
1236922
result:
ok 1 number(s): "1236922"
Test #8:
score: 0
Accepted
time: 1ms
memory: 1556kb
input:
8 101102801
output:
1236922
result:
ok 1 number(s): "1236922"
Test #9:
score: 0
Accepted
time: 0ms
memory: 1508kb
input:
6 458322727
output:
4894
result:
ok 1 number(s): "4894"
Test #10:
score: 0
Accepted
time: 1ms
memory: 1748kb
input:
7 721691819
output:
73884
result:
ok 1 number(s): "73884"
Test #11:
score: 0
Accepted
time: 1ms
memory: 1696kb
input:
7 370629137
output:
73884
result:
ok 1 number(s): "73884"
Subtask #3:
score: 27
Accepted
Dependency #1:
100%
Accepted
Dependency #2:
100%
Accepted
Test #12:
score: 27
Accepted
time: 1ms
memory: 1508kb
input:
30 779092367
output:
686412377
result:
ok 1 number(s): "686412377"
Test #13:
score: 0
Accepted
time: 1ms
memory: 1764kb
input:
29 963995171
output:
128570082
result:
ok 1 number(s): "128570082"
Test #14:
score: 0
Accepted
time: 1ms
memory: 1612kb
input:
18 666092701
output:
185922458
result:
ok 1 number(s): "185922458"
Test #15:
score: 0
Accepted
time: 0ms
memory: 1696kb
input:
14 671243719
output:
623913899
result:
ok 1 number(s): "623913899"
Subtask #4:
score: 14
Accepted
Dependency #1:
100%
Accepted
Dependency #2:
100%
Accepted
Dependency #3:
100%
Accepted
Test #16:
score: 14
Accepted
time: 3ms
memory: 1880kb
input:
300 463478027
output:
89265245
result:
ok 1 number(s): "89265245"
Test #17:
score: 0
Accepted
time: 3ms
memory: 1540kb
input:
296 567610679
output:
406342763
result:
ok 1 number(s): "406342763"
Test #18:
score: 0
Accepted
time: 3ms
memory: 1704kb
input:
297 609090359
output:
128986577
result:
ok 1 number(s): "128986577"
Test #19:
score: 0
Accepted
time: 1ms
memory: 1704kb
input:
48 759569383
output:
635573072
result:
ok 1 number(s): "635573072"
Test #20:
score: 0
Accepted
time: 1ms
memory: 1468kb
input:
99 298873033
output:
285340078
result:
ok 1 number(s): "285340078"
Subtask #5:
score: 36
Accepted
Dependency #1:
100%
Accepted
Dependency #2:
100%
Accepted
Dependency #3:
100%
Accepted
Dependency #4:
100%
Accepted
Test #21:
score: 36
Accepted
time: 215ms
memory: 1592kb
input:
3000 752129633
output:
33058561
result:
ok 1 number(s): "33058561"
Test #22:
score: 0
Accepted
time: 212ms
memory: 1592kb
input:
2993 491173567
output:
343277625
result:
ok 1 number(s): "343277625"
Test #23:
score: 0
Accepted
time: 211ms
memory: 1756kb
input:
2993 783095563
output:
776085006
result:
ok 1 number(s): "776085006"
Test #24:
score: 0
Accepted
time: 3ms
memory: 1560kb
input:
327 399783431
output:
163535283
result:
ok 1 number(s): "163535283"
Test #25:
score: 0
Accepted
time: 38ms
memory: 1572kb
input:
1233 857060207
output:
422139845
result:
ok 1 number(s): "422139845"
Test #26:
score: 0
Accepted
time: 31ms
memory: 1520kb
input:
1114 600227447
output:
598509129
result:
ok 1 number(s): "598509129"
Subtask #6:
score: 0
Time Limit Exceeded
Dependency #1:
100%
Accepted
Dependency #2:
100%
Accepted
Dependency #3:
100%
Accepted
Dependency #4:
100%
Accepted
Dependency #5:
100%
Accepted
Test #27:
score: 0
Time Limit Exceeded
input:
20000 221054167