QOJ.ac
QOJ
| ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
|---|---|---|---|---|---|---|---|---|---|
| #445936 | #8526. Polygon II | grass8cow | AC ✓ | 217ms | 8396kb | C++17 | 1.2kb | 2024-06-16 17:29:24 | 2024-06-16 17:29:24 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
int n;
const int mod=1e9+7;
int qpow(int a,int b){
int c=1;
for(;b;b>>=1){
if(b&1)c=1ll*a*c%mod;
a=1ll*a*a%mod;
}
return c;
}
int d[2010],c[1010][1010],a[1010],dp[60][2010],t[60],z[60],i2[1010];
int main(){
scanf("%d",&n);
c[0][0]=1;
i2[0]=1;
for(int i=1;i<=n;i++){
i2[i]=1ll*i2[i-1]*qpow(2,mod-2)%mod;
c[i][0]=1;
for(int j=1;j<=i;j++)c[i][j]=(c[i-1][j-1]+c[i-1][j])%mod;
}
for(int i=1;i<=n;i++){scanf("%d",&a[i]);for(int j=0;j<a[i];j++)t[j]++;z[a[i]]++;}
int ij=1;
for(int i=0;i<=50;i++)ij=1ll*ij*i2[t[i]]%mod;
for(int i=1;i<=n;i++)ij=1ll*ij*qpow(i,mod-2)%mod;
for(int i=0;i<=n;i++)for(int j=1;i+j<=n+1;j++)(d[i+j-1]+=((i&1)?-1ll:1ll)*c[n][i]*qpow(j,n)%mod*ij%mod)%=mod;
for(int i=n;i;i--)(d[i]-=d[i-1])%=mod;
for(int i=0;i<n;i++)for(int j=0;j<=t[0];j++)(dp[0][i+j]+=1ll*d[i]*c[t[0]][j]%mod)%=mod;
int ans=0;
for(int i=0;i<=50;i++){
(ans+=1ll*z[i]*dp[i][0]%mod)%=mod;
for(int j=0;j<=n*2;j++)if(dp[i][j])for(int k=0;k<=t[i+1];k++)
(dp[i+1][(j>>1)+k]+=1ll*dp[i][j]*c[t[i+1]][k]%mod)%=mod;
}
printf("%d",(mod+1-ans)%mod);
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 1ms
memory: 6112kb
input:
3 0 2 0
output:
166666668
result:
ok 1 number(s): "166666668"
Test #2:
score: 0
Accepted
time: 1ms
memory: 4148kb
input:
3 0 0 0
output:
500000004
result:
ok 1 number(s): "500000004"
Test #3:
score: 0
Accepted
time: 0ms
memory: 4120kb
input:
3 5 6 7
output:
208333335
result:
ok 1 number(s): "208333335"
Test #4:
score: 0
Accepted
time: 1ms
memory: 4128kb
input:
3 0 25 50
output:
889268532
result:
ok 1 number(s): "889268532"
Test #5:
score: 0
Accepted
time: 1ms
memory: 4172kb
input:
10 39 11 25 1 12 44 10 46 27 15
output:
913863330
result:
ok 1 number(s): "913863330"
Test #6:
score: 0
Accepted
time: 1ms
memory: 4372kb
input:
57 43 22 3 16 7 5 24 32 25 16 41 28 24 30 28 10 32 48 41 43 34 37 48 34 3 9 21 41 49 25 2 0 36 45 34 33 45 9 42 29 43 9 38 34 44 33 44 6 46 39 22 36 40 37 19 34 3
output:
400729664
result:
ok 1 number(s): "400729664"
Test #7:
score: 0
Accepted
time: 1ms
memory: 4548kb
input:
100 44 32 6 6 6 44 12 32 6 9 23 12 14 23 12 14 23 49 6 14 32 23 49 9 32 24 23 6 32 6 49 23 12 44 24 9 14 6 24 44 24 23 44 44 49 32 49 12 49 49 24 49 12 23 3 14 6 3 3 6 12 3 49 24 49 24 24 32 23 32 49 14 3 24 49 3 32 14 44 24 49 3 32 23 49 44 44 9 23 14 49 9 3 6 44 24 3 3 12 44
output:
32585394
result:
ok 1 number(s): "32585394"
Test #8:
score: 0
Accepted
time: 34ms
memory: 7976kb
input:
1000 2 27 0 0 27 0 2 0 27 0 27 27 0 0 0 0 0 2 0 27 0 2 2 0 27 27 0 0 0 27 2 2 2 27 0 2 27 2 0 2 27 0 0 27 0 27 0 0 27 2 27 2 2 27 2 27 0 0 27 0 27 0 2 27 2 2 0 27 27 27 27 0 27 0 27 0 2 2 0 2 2 27 0 0 27 0 0 27 0 2 27 27 2 27 2 0 0 2 27 27 27 27 27 27 2 2 0 2 2 0 2 2 0 27 0 27 2 2 0 27 27 0 0 27 2 2...
output:
94588769
result:
ok 1 number(s): "94588769"
Test #9:
score: 0
Accepted
time: 112ms
memory: 8396kb
input:
1000 40 14 47 3 32 18 3 49 22 23 32 18 23 24 18 32 23 39 32 27 49 49 22 50 50 22 23 47 14 47 50 32 22 24 49 49 18 22 18 22 50 3 32 47 40 3 39 22 24 47 32 49 49 22 32 39 14 49 39 3 32 22 24 18 39 49 24 18 40 23 23 49 39 39 18 39 27 49 14 27 27 14 18 24 39 22 40 50 18 18 18 39 39 18 23 23 22 3 49 47 2...
output:
626481946
result:
ok 1 number(s): "626481946"
Test #10:
score: 0
Accepted
time: 84ms
memory: 8272kb
input:
1000 28 32 35 9 21 11 43 23 45 15 23 2 8 3 39 41 31 9 45 35 27 14 40 28 31 9 31 9 9 40 8 6 27 43 3 27 23 49 27 6 28 25 11 9 15 27 38 27 12 28 25 2 15 27 45 6 27 1 21 38 1 25 27 21 49 31 31 14 39 39 8 39 40 28 15 31 21 14 43 38 11 8 8 23 9 11 15 2 11 39 32 14 28 15 40 49 27 9 23 9 9 6 21 2 2 1 14 11 ...
output:
644443122
result:
ok 1 number(s): "644443122"
Test #11:
score: 0
Accepted
time: 84ms
memory: 8116kb
input:
972 39 15 23 0 40 29 43 47 6 9 30 9 2 8 19 9 45 25 26 38 33 18 6 33 44 48 24 8 4 16 33 42 33 31 36 33 13 16 3 12 21 19 1 30 24 23 43 35 0 33 31 32 23 31 36 12 26 0 29 48 28 33 28 28 3 49 9 5 29 8 29 28 49 41 33 49 5 49 6 9 50 25 39 11 1 36 6 44 10 34 32 31 25 31 36 36 3 9 50 35 47 43 25 46 30 18 5 2...
output:
684920840
result:
ok 1 number(s): "684920840"
Test #12:
score: 0
Accepted
time: 3ms
memory: 4552kb
input:
147 34 47 42 23 46 3 41 9 15 42 21 32 24 1 19 46 29 35 38 20 2 43 36 47 19 23 20 9 6 28 48 46 45 21 19 41 31 36 50 7 11 25 0 43 38 46 21 2 26 40 32 14 45 35 47 21 13 26 26 30 3 36 35 45 36 21 21 25 2 40 35 50 23 3 16 44 40 42 6 37 36 19 20 14 30 47 13 49 47 45 26 12 15 21 42 30 19 5 21 9 28 8 3 34 4...
output:
972735235
result:
ok 1 number(s): "972735235"
Test #13:
score: 0
Accepted
time: 90ms
memory: 8328kb
input:
1000 36 15 9 5 35 37 17 30 24 13 18 32 14 35 36 26 23 7 21 15 43 15 21 11 33 33 9 16 5 26 1 45 48 27 20 20 20 48 42 27 22 7 39 35 11 38 33 47 22 34 43 4 32 0 47 35 48 8 9 3 40 3 27 22 20 43 12 37 30 18 2 37 37 35 44 3 42 14 20 24 44 5 17 38 46 41 28 23 21 7 13 15 35 38 21 14 6 37 37 6 13 34 32 13 23...
output:
179933029
result:
ok 1 number(s): "179933029"
Test #14:
score: 0
Accepted
time: 94ms
memory: 8288kb
input:
1000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 7 7 7 7 7 7 7 7 7 7...
output:
540327646
result:
ok 1 number(s): "540327646"
Test #15:
score: 0
Accepted
time: 90ms
memory: 8040kb
input:
1000 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 49 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 47 46 46 46 46 46 46 46 46 46 46 46 46 46 4...
output:
169647494
result:
ok 1 number(s): "169647494"
Test #16:
score: 0
Accepted
time: 212ms
memory: 8320kb
input:
1000 11 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 40 50 50 50 50 50 21 50 12 50 50 50 50 50 0 50 50 50 38 50 50 50 50 50 50 25 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 7 50 50 50 50 50 50 50 50 ...
output:
862643524
result:
ok 1 number(s): "862643524"
Test #17:
score: 0
Accepted
time: 217ms
memory: 8292kb
input:
1000 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 5...
output:
819612372
result:
ok 1 number(s): "819612372"
Test #18:
score: 0
Accepted
time: 217ms
memory: 8268kb
input:
1000 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 5...
output:
18215579
result:
ok 1 number(s): "18215579"
Test #19:
score: 0
Accepted
time: 1ms
memory: 5808kb
input:
16 0 2 24 1 23 9 14 17 28 29 25 27 15 19 11 20
output:
115090079
result:
ok 1 number(s): "115090079"
Test #20:
score: 0
Accepted
time: 23ms
memory: 8040kb
input:
1000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0...
output:
819612372
result:
ok 1 number(s): "819612372"
Test #21:
score: 0
Accepted
time: 1ms
memory: 4204kb
input:
18 9 4 21 5 22 6 9 16 3 14 11 2 0 12 6 3 7 21
output:
0
result:
ok 1 number(s): "0"
Extra Test:
score: 0
Extra Test Passed