#include <bits/stdc++.h>
using namespace std;
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#define ll long long
#define ii pair<ll,ll>
#define endl '\n'
const ll inf=1e15;
const ll mod=1e6+7;
map<ii,int> dp;
ll solve(ll digit, ll rem){
if (rem==0) return 1;
if (dp.find(make_pair(digit,rem))!=dp.end()) return dp[{digit,rem}];
ll ans=0;
ans=(solve(digit,rem-1)*digit)%mod+solve(digit+1,rem-1);
return dp[{digit,rem}]=ans%mod;
}
int main(){
ios_base::sync_with_stdio(0);
cin.tie(0);
ll n,ele,ans=0;
cin>>n;
ll ele2=0,temp;
for (int i=1;i<=n;i++){
cin>>ele;
for (int j=1;j<ele;j++){
temp=max<ll>(j,ele2);
ans+=solve(temp,n-i);
ans%=mod;
}
ele2=max(ele,ele2);
}
cout<<(ans+1)%mod;
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
204 KB |
Output is correct |
2 |
Correct |
1 ms |
204 KB |
Output is correct |
3 |
Correct |
0 ms |
204 KB |
Output is correct |
4 |
Correct |
1 ms |
204 KB |
Output is correct |
5 |
Correct |
1 ms |
204 KB |
Output is correct |
6 |
Correct |
0 ms |
204 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
204 KB |
Output is correct |
2 |
Correct |
0 ms |
204 KB |
Output is correct |
3 |
Correct |
0 ms |
204 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
204 KB |
Output is correct |
2 |
Correct |
0 ms |
204 KB |
Output is correct |
3 |
Correct |
1 ms |
204 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
4 ms |
588 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
588 KB |
Output is correct |
2 |
Correct |
2 ms |
588 KB |
Output is correct |
3 |
Correct |
2 ms |
588 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
90 ms |
7900 KB |
Output is correct |
2 |
Correct |
74 ms |
8200 KB |
Output is correct |
3 |
Correct |
84 ms |
8048 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
403 ms |
31404 KB |
Output is correct |
2 |
Correct |
424 ms |
31284 KB |
Output is correct |
3 |
Correct |
502 ms |
31556 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Execution timed out |
1086 ms |
64472 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Execution timed out |
1084 ms |
64900 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Execution timed out |
1096 ms |
65520 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |