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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#104412 | #6333. Festivals in JOI Kingdom 2 | oscaryang | 87 | 279ms | 10460kb | C++20 | 1.3kb | 2023-05-10 17:13:03 | 2023-05-10 17:13:05 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
const int N=4e5+5;
int n,P,fc[N],ifc[N];
int o,w,f[2][N][3],ad[N][3],ans,all;
//calc
inline void inc(int &x,int y) { x+=y-P; x+=(x>>31)&P; }
inline void dec(int &x,int y) { x-=y; x+=(x>>31)&P; }
inline int pls(int x,int y) { return x+=y-P, x+=(x>>31)&P, x; }
inline int power(int a,int b) { int res=1; for(;b;b>>=1,a=1ll*a*a%P) if(b&1) res=1ll*res*a%P; return res; }
int main() {
cin>>n>>P;
fc[0]=ifc[0]=all=1;
for(int i=1;i<N;i++) fc[i]=1ll*i*fc[i-1]%P;
ifc[N-1]=power(fc[N-1],P-2);
for(int i=N-2;i>=1;i--) ifc[i]=1ll*ifc[i+1]*(i+1)%P;
int *F, m=2*n; o=0; w=1; f[o][0][0]=1;
for(int i=0,up;i<=m;i++,swap(o,w)) {
for(int j=0;j<3;j++) inc(f[o][0][j],ad[i][j]);
if(i==m) break;
up=min(m-i+1,i);
for(int k=0;k<=up;k++) {
F = f[o][k];
if(F[0]) inc(f[w][k+1][1],F[0]);
if(F[1]) {
inc(f[w][k+1][1],F[1]);
if(k && i+k<=m) inc(ad[i+k][0],1ll*F[1]*fc[m-i-1]%P*ifc[m-i-k]%P);
if(k>1 && i+k<=m) inc(ad[i+k-1][2],1ll*F[1]*(k-1)%P*fc[m-i-1]%P*ifc[m-i-k+1]%P);
}
if(F[2]) {
inc(f[w][k+1][2],F[2]);
inc(f[w][k][0],F[2]);
}
F[0]=F[1]=F[2]=0;
}
}
for(int i=1;i<=m;i+=2) all=1ll*all*i%P;
dec(ans=all,f[o][0][0]);
cout<<ans<<endl;
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Subtask #1:
score: 5
Accepted
Test #1:
score: 5
Accepted
time: 14ms
memory: 8752kb
input:
1 194903119
output:
0
result:
ok 1 number(s): "0"
Test #2:
score: 0
Accepted
time: 14ms
memory: 9132kb
input:
2 933234047
output:
0
result:
ok 1 number(s): "0"
Test #3:
score: 0
Accepted
time: 9ms
memory: 10384kb
input:
3 277793111
output:
2
result:
ok 1 number(s): "2"
Test #4:
score: 0
Accepted
time: 14ms
memory: 10192kb
input:
4 355321177
output:
28
result:
ok 1 number(s): "28"
Test #5:
score: 0
Accepted
time: 15ms
memory: 10448kb
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: 13ms
memory: 7568kb
input:
8 361605653
output:
1236922
result:
ok 1 number(s): "1236922"
Test #7:
score: 0
Accepted
time: 14ms
memory: 9220kb
input:
8 995512643
output:
1236922
result:
ok 1 number(s): "1236922"
Test #8:
score: 0
Accepted
time: 13ms
memory: 7496kb
input:
8 101102801
output:
1236922
result:
ok 1 number(s): "1236922"
Test #9:
score: 0
Accepted
time: 14ms
memory: 8128kb
input:
6 458322727
output:
4894
result:
ok 1 number(s): "4894"
Test #10:
score: 0
Accepted
time: 9ms
memory: 7908kb
input:
7 721691819
output:
73884
result:
ok 1 number(s): "73884"
Test #11:
score: 0
Accepted
time: 10ms
memory: 7960kb
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: 14ms
memory: 10460kb
input:
30 779092367
output:
686412377
result:
ok 1 number(s): "686412377"
Test #13:
score: 0
Accepted
time: 15ms
memory: 10332kb
input:
29 963995171
output:
128570082
result:
ok 1 number(s): "128570082"
Test #14:
score: 0
Accepted
time: 11ms
memory: 10052kb
input:
18 666092701
output:
185922458
result:
ok 1 number(s): "185922458"
Test #15:
score: 0
Accepted
time: 12ms
memory: 10132kb
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: 9ms
memory: 9464kb
input:
300 463478027
output:
89265245
result:
ok 1 number(s): "89265245"
Test #17:
score: 0
Accepted
time: 16ms
memory: 8088kb
input:
296 567610679
output:
406342763
result:
ok 1 number(s): "406342763"
Test #18:
score: 0
Accepted
time: 17ms
memory: 8320kb
input:
297 609090359
output:
128986577
result:
ok 1 number(s): "128986577"
Test #19:
score: 0
Accepted
time: 14ms
memory: 7768kb
input:
48 759569383
output:
635573072
result:
ok 1 number(s): "635573072"
Test #20:
score: 0
Accepted
time: 11ms
memory: 8212kb
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: 279ms
memory: 8108kb
input:
3000 752129633
output:
33058561
result:
ok 1 number(s): "33058561"
Test #22:
score: 0
Accepted
time: 253ms
memory: 6872kb
input:
2993 491173567
output:
343277625
result:
ok 1 number(s): "343277625"
Test #23:
score: 0
Accepted
time: 263ms
memory: 7532kb
input:
2993 783095563
output:
776085006
result:
ok 1 number(s): "776085006"
Test #24:
score: 0
Accepted
time: 17ms
memory: 7504kb
input:
327 399783431
output:
163535283
result:
ok 1 number(s): "163535283"
Test #25:
score: 0
Accepted
time: 56ms
memory: 8132kb
input:
1233 857060207
output:
422139845
result:
ok 1 number(s): "422139845"
Test #26:
score: 0
Accepted
time: 37ms
memory: 9264kb
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