#include <iostream>
#include <algorithm>
using namespace std;
const int N = 107;
typedef long long ll;
const ll MOD = 1e9+7;
int A[N],B[N];
ll dp[N][2]; // 0 - prev was not split, 1 - prev was split
ll X(int n){
if (n<0){
return 0;
}
return (n+1)/2;
}
ll solve(int &n){
sort(A+1,A+1+n,greater<int>());
int ptr = 0;
for(int i = n;i>1;i-=1){
if (A[i-1]==A[i]+1 || (A[i-1]<=1 && A[i]<=1)){
A[i-1] += 1;
}
else{
B[++ptr] = A[i];
}
}
B[++ptr] = A[1];
for(int i = 1;i<=ptr;i+=1){
A[i] = B[i];
}
n = ptr;
dp[0][0] = 1;
for(int i = 1;i<=n;i+=1){
dp[i][0] = (A[i-1]!=A[i]?dp[i-1][0]:0)+dp[i-1][1];
dp[i][1] = dp[i-1][0]*X(A[i]-2-A[i-1])+dp[i-1][1]*X(A[i]-2-(A[i-1]-1));
dp[i][0] %= MOD;
dp[i][1] %= MOD;
}
return (dp[n][0]+dp[n][1])%MOD;
}
int main(){
int n;
cin>>n;
int sz = 0;
for(int i = 1;i<=n;i+=1){
cin>>A[++sz];
cout<<solve(sz)<<'\n';
}
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
0 ms |
212 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
0 ms |
212 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
304 KB |
Output is correct |
2 |
Correct |
1 ms |
212 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
0 ms |
212 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
1 ms |
212 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
0 ms |
212 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |