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Submission #1011070

# Submission time Handle Problem Language Result Execution time Memory
1011070 2024-06-29T18:24:25 Z medmdg Fancy Fence (CEOI20_fancyfence) C++17
100 / 100
 135 ms 10516 KB 
#include<bits/stdc++.h>
using namespace std;
#define int long long
#define all(v) v.begin(),v.end()
#define pb push_back
const int mod=1e9+7;
int f(int a){
    a%=mod;
    return ((a%mod*(a+1)%mod)%mod*500000004%mod)%mod;
}
const int mxn=1e5+100;
int sz[mxn];
int W[mxn];
int p[mxn];
int find(int node){
    return node==p[node]?node:p[node]=find(p[node]);
}
void merge(int a,int b){
    a=find(a);
    b=find(b);
    if(a==b) return;
    if(sz[a]<sz[b]) swap(a,b);
    sz[a]+=sz[b];
    p[b]=a;
    W[a]=(W[a]%mod+W[b]%mod)%mod;
}
signed main(){
    int n;
    cin>>n;
    vector<int> h(n+1);
    vector<int> w(n+1);
    for(int i=0;i<n;i++){
        cin>>h[i];
    }
    for(int i=0;i<n;i++){
        cin>>w[i];
    }
    int ans=0;
    for(int i=0;i<n;i++){
        ans=(ans%mod+f(h[i])%mod*f(w[i])%mod)%mod;
    }
    ans%=mod;
    vector<vector<int>> v;
    for(int i=0;i+1<n;i++){
        v.pb({i,i+1,min(h[i],h[i+1])});
    }
    sort(all(v),[&](auto a,auto b){
        return a[2]>b[2];
    });
    for(int i=0;i<n;i++){
        sz[i]=1;
        p[i]=i;
        W[i]+=w[i];
    }
    for(auto x:v){
        int a=W[find(x[0])];
        int b=W[find(x[1])];
        a+=mod;
        b+=mod;
        a%=mod;
        b%=mod;
        merge(x[0],x[1]);
        ans=(ans%mod+a%mod*b%mod*f(x[2])%mod)%mod;
    }
    cout<<ans<<endl;
}

Subtask #1
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2392 KB Output is correct
2 Correct 0 ms 2392 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 33 ms 6032 KB Output is correct
4 Correct 71 ms 10240 KB Output is correct
5 Correct 77 ms 9724 KB Output is correct
6 Correct 70 ms 10436 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 9 ms 3232 KB Output is correct
3 Correct 44 ms 6012 KB Output is correct
4 Correct 111 ms 9708 KB Output is correct
5 Correct 91 ms 9732 KB Output is correct
6 Correct 0 ms 2396 KB Output is correct

Subtask #5
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2396 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 9 ms 3216 KB Output is correct
4 Correct 40 ms 6024 KB Output is correct
5 Correct 83 ms 9612 KB Output is correct
6 Correct 93 ms 9732 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 9 ms 3212 KB Output is correct
9 Correct 46 ms 6152 KB Output is correct
10 Correct 92 ms 9604 KB Output is correct
11 Correct 86 ms 9732 KB Output is correct
12 Correct 0 ms 2396 KB Output is correct

Subtask #6
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct
6 Correct 0 ms 2396 KB Output is correct
7 Correct 0 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2420 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 0 ms 2396 KB Output is correct

Subtask #7
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 2 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 0 ms 2396 KB Output is correct
7 Correct 0 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 0 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 38 ms 6024 KB Output is correct
12 Correct 71 ms 10236 KB Output is correct
13 Correct 73 ms 9728 KB Output is correct
14 Correct 81 ms 9604 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 9 ms 3220 KB Output is correct
17 Correct 50 ms 6152 KB Output is correct
18 Correct 90 ms 9732 KB Output is correct
19 Correct 97 ms 9612 KB Output is correct
20 Correct 1 ms 2396 KB Output is correct
21 Correct 8 ms 3232 KB Output is correct
22 Correct 41 ms 6024 KB Output is correct
23 Correct 89 ms 9740 KB Output is correct
24 Correct 84 ms 9728 KB Output is correct
25 Correct 1 ms 2392 KB Output is correct
26 Correct 1 ms 2396 KB Output is correct
27 Correct 1 ms 2396 KB Output is correct
28 Correct 1 ms 2396 KB Output is correct
29 Correct 1 ms 2396 KB Output is correct
30 Correct 12 ms 3224 KB Output is correct
31 Correct 10 ms 3224 KB Output is correct
32 Correct 46 ms 6016 KB Output is correct
33 Correct 51 ms 6148 KB Output is correct
34 Correct 101 ms 10516 KB Output is correct
35 Correct 101 ms 9600 KB Output is correct
36 Correct 101 ms 9724 KB Output is correct
37 Correct 135 ms 9728 KB Output is correct
38 Correct 1 ms 2396 KB Output is correct
39 Correct 117 ms 9732 KB Output is correct
40 Correct 106 ms 9724 KB Output is correct
41 Correct 99 ms 9732 KB Output is correct
42 Correct 102 ms 9872 KB Output is correct