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Submission #974832

# Submission time Handle Problem Language Result Execution time Memory
974832 2024-05-03T21:05:46 Z imarn Fancy Fence (CEOI20_fancyfence) C++14
100 / 100
 29 ms 5204 KB 
#include<bits/stdc++.h>
#define f first
#define s second
#define pb push_back
#define pii pair<int,int>
#define ll long long
#define sz(x) (ll)x.size()
#define pp pair<int,pii>
using namespace std;
const int mxn=1e5+5,inf=1e9+7;
int pr[mxn]{0};
ll sz[mxn]{0};
int get(int r){
    return pr[r]==r?r:pr[r]=get(pr[r]);
}
ll c(ll x){
    return ((x*(x+1))/2)%inf;
}
int main(){
    ios_base::sync_with_stdio(0);cin.tie(0);ll ans=0;
    int n;cin>>n;vector<pp>v(n);
    for(int i=0;i<n;i++)cin>>v[i].f,v[i].s.s=i+1;
    for(int i=0;i<n;i++)cin>>v[i].s.f;sort(v.begin(),v.end(),greater<pp>());
    for(auto it : v){int i=it.s.s;pr[i]=i;sz[i]=it.s.f;sz[i]%=inf;
        ans+=(c(sz[i])*c(it.f))%inf;
        if(pr[it.s.s-1]&&get(it.s.s-1)!=get(i)){
            int u=get(it.s.s-1);
            ans-=((c(sz[u])*c(it.f))%inf+(c(sz[i])*c(it.f))%inf)%inf;ans%=inf;
            sz[i]+=sz[u];sz[i]%=inf;
            pr[u]=i;
            ans+=(c(sz[i])*c(it.f))%inf;ans%=inf;
        }
        if(pr[it.s.s+1]&&get(it.s.s+1)!=get(i)){
            int u=get(it.s.s+1);
            ans-=((c(sz[u])*c(it.f))%inf+(c(sz[i])*c(it.f))%inf)%inf;ans%=inf;
            sz[i]+=sz[u];sz[i]%=inf;
            pr[u]=i;
            ans+=(c(sz[i])*c(it.f))%inf;ans%=inf;
        }
    }cout<<(ans%inf+inf)%inf;
}

Compilation message

fancyfence.cpp: In function 'int main()':
fancyfence.cpp:23:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   23 |     for(int i=0;i<n;i++)cin>>v[i].s.f;sort(v.begin(),v.end(),greater<pp>());
      |     ^~~
fancyfence.cpp:23:39: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   23 |     for(int i=0;i<n;i++)cin>>v[i].s.f;sort(v.begin(),v.end(),greater<pp>());
      |                                       ^~~~

Subtask #1
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 12 ms 2200 KB Output is correct
4 Correct 24 ms 3932 KB Output is correct
5 Correct 24 ms 3932 KB Output is correct
6 Correct 24 ms 3928 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 3 ms 604 KB Output is correct
3 Correct 14 ms 1576 KB Output is correct
4 Correct 29 ms 2668 KB Output is correct
5 Correct 27 ms 2664 KB Output is correct
6 Correct 0 ms 344 KB Output is correct

Subtask #5
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 3 ms 604 KB Output is correct
4 Correct 13 ms 1576 KB Output is correct
5 Correct 27 ms 2676 KB Output is correct
6 Correct 27 ms 2676 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 3 ms 604 KB Output is correct
9 Correct 13 ms 1628 KB Output is correct
10 Correct 18 ms 2680 KB Output is correct
11 Correct 19 ms 2640 KB Output is correct
12 Correct 0 ms 348 KB Output is correct

Subtask #6
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 600 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 344 KB Output is correct

Subtask #7
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 472 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 600 KB Output is correct
11 Correct 12 ms 2204 KB Output is correct
12 Correct 25 ms 3932 KB Output is correct
13 Correct 27 ms 3924 KB Output is correct
14 Correct 24 ms 3832 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 3 ms 884 KB Output is correct
17 Correct 14 ms 2456 KB Output is correct
18 Correct 28 ms 4700 KB Output is correct
19 Correct 28 ms 4692 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 2 ms 860 KB Output is correct
22 Correct 13 ms 2396 KB Output is correct
23 Correct 20 ms 4452 KB Output is correct
24 Correct 23 ms 4568 KB Output is correct
25 Correct 0 ms 344 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 3 ms 860 KB Output is correct
31 Correct 3 ms 860 KB Output is correct
32 Correct 14 ms 2392 KB Output is correct
33 Correct 13 ms 2396 KB Output is correct
34 Correct 26 ms 4316 KB Output is correct
35 Correct 28 ms 4436 KB Output is correct
36 Correct 27 ms 4696 KB Output is correct
37 Correct 27 ms 4692 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 27 ms 4692 KB Output is correct
40 Correct 24 ms 4700 KB Output is correct
41 Correct 22 ms 4692 KB Output is correct
42 Correct 23 ms 5204 KB Output is correct