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Submission #703426

# Submission time Handle Problem Language Result Execution time Memory
703426 2023-02-27T10:14:52 Z Darren0724 Fancy Fence (CEOI20_fancyfence) C++17
100 / 100
 29 ms 4956 KB 
#include<bits/stdc++.h>
using namespace std;
#define int long long
#define pii pair<int,int>
#define all(x) x.begin(),x.end()
const int mod=1e9+7;
int cal(int left,int right,int up,int down){
    int width=right-left+1;
    width%=mod;
    int ans=width*(width-1)/2;
    ans%=mod;
    int tmp=up*(up+1)-down*(down+1);
    tmp/=2;
    tmp%=mod;
    //cout<<left<<' '<<right<<' '<<up<<' '<<down<<' '<<ans*tmp<<endl;
    return ans*tmp%mod;
}
signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    int n;cin>>n;
    vector<int> a(n+1),b(n+1);
    for(int i=1;i<=n;i++){
        cin>>a[i];
    }
    for(int i=1;i<=n;i++){
        cin>>b[i];
        b[i]+=b[i-1];
    }
    int ans=0;
    vector<int> v;
    v.push_back(0);
    for(int i=1;i<=n;i++){
        while(a[i]<=a[v.back()]){
            //cout<<"OK"<<endl;
            int tmp=v.back();
            v.pop_back();
            ans+=cal(b[v.back()],b[i-1],a[tmp],max(a[i],a[v.back()]));
            ans%=mod;
        }

        v.push_back(i);

    }
    while(v.size()>1){
        int tmp=v.back();
        v.pop_back();
        ans+=cal(b[v.back()],b[n],a[tmp],a[v.back()]);
        ans%=mod;
    }
    cout<<ans<<endl;

    return 0;
}
/*
4
1 3 2 4
1 1 1 1
32
*/

Subtask #1
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 284 KB Output is correct
5 Correct 1 ms 212 KB Output is correct

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 12 ms 1600 KB Output is correct
4 Correct 22 ms 3028 KB Output is correct
5 Correct 16 ms 3012 KB Output is correct
6 Correct 19 ms 3028 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 2 ms 468 KB Output is correct
3 Correct 10 ms 1124 KB Output is correct
4 Correct 19 ms 1896 KB Output is correct
5 Correct 22 ms 1900 KB Output is correct
6 Correct 0 ms 212 KB Output is correct

Subtask #5
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 3 ms 468 KB Output is correct
4 Correct 11 ms 1108 KB Output is correct
5 Correct 23 ms 1900 KB Output is correct
6 Correct 29 ms 1876 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 2 ms 596 KB Output is correct
9 Correct 11 ms 1500 KB Output is correct
10 Correct 20 ms 3048 KB Output is correct
11 Correct 22 ms 3432 KB Output is correct
12 Correct 1 ms 212 KB Output is correct

Subtask #6
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 320 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 352 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 0 ms 212 KB Output is correct

Subtask #7
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 316 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 328 KB Output is correct
11 Correct 9 ms 1680 KB Output is correct
12 Correct 16 ms 3032 KB Output is correct
13 Correct 16 ms 3036 KB Output is correct
14 Correct 16 ms 3064 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 3 ms 596 KB Output is correct
17 Correct 11 ms 1996 KB Output is correct
18 Correct 21 ms 3784 KB Output is correct
19 Correct 24 ms 3928 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 3 ms 852 KB Output is correct
22 Correct 12 ms 2392 KB Output is correct
23 Correct 21 ms 4808 KB Output is correct
24 Correct 27 ms 4956 KB Output is correct
25 Correct 1 ms 212 KB Output is correct
26 Correct 1 ms 332 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 352 KB Output is correct
29 Correct 1 ms 352 KB Output is correct
30 Correct 2 ms 596 KB Output is correct
31 Correct 3 ms 596 KB Output is correct
32 Correct 14 ms 1872 KB Output is correct
33 Correct 11 ms 2004 KB Output is correct
34 Correct 20 ms 3548 KB Output is correct
35 Correct 20 ms 3540 KB Output is correct
36 Correct 21 ms 3788 KB Output is correct
37 Correct 21 ms 3784 KB Output is correct
38 Correct 1 ms 212 KB Output is correct
39 Correct 22 ms 3784 KB Output is correct
40 Correct 22 ms 3804 KB Output is correct
41 Correct 23 ms 3936 KB Output is correct
42 Correct 22 ms 4428 KB Output is correct