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Submission #1015920

# Submission time Handle Problem Language Result Execution time Memory
1015920 2024-07-07T04:50:08 Z Luvidi Fancy Fence (CEOI20_fancyfence) C++17
100 / 100
 88 ms 16208 KB 
#include <bits/stdc++.h>
using namespace std;
 
#define ll long long
#define pll pair<ll, ll>
#define pii pair<int, int>
#define fs first
#define sc second
#define pb push_back
 
void solve() {
    int n;
    cin>>n;
    ll h[n],w[n],MOD=1e9+7;
    for(int i=0;i<n;i++)cin>>h[i];
    for(int i=0;i<n;i++)cin>>w[i];
    ll cw=0;
    map<ll,vector<pll>> m;
    for(int i=0;i<n;i++){
        m[h[i]].pb({cw+1,cw+w[i]});
        cw+=w[i];
    }
    set<pll> s;
    ll pr=0,ans=0,sum=cw%MOD*(cw%MOD+1)/2;
    sum%=MOD;
    s.insert({1,cw});
    for(auto[x,v]:m){
        ll a=x-pr;
        ans+=(a*(a+1)/2+a*pr)%MOD*sum;
        ans%=MOD;
        for(auto[l,r]:v){
            auto it=s.lower_bound({l+1,0});
            it--;
            auto[l2,r2]=*it;
            s.erase(it);
            if(l2<l)s.insert({l2,l-1});
            if(r<r2)s.insert({r+1,r2});
            l%=MOD;
            l2%=MOD;
            r%=MOD;
            r2%=MOD;
            sum-=(r2-l2+1)*(r2-l2+2)/2;
            sum+=(l-l2)*(l-l2+1)/2;
            sum+=(r2-r)*(r2-r+1)/2;
            sum%=MOD;
        }
        pr=x;
    }
    ans+=MOD;
    ans%=MOD;
    cout<<ans<<'\n';
}
 
int main() {   
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
 
    solve();
}

Subtask #1
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 2 ms 604 KB Output is correct

Subtask #2
12.0 / 12.0

# 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 0 ms 348 KB Output is correct
4 Correct 1 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 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 12 ms 3732 KB Output is correct
4 Correct 25 ms 6992 KB Output is correct
5 Correct 25 ms 6996 KB Output is correct
6 Correct 19 ms 6708 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 2 ms 1192 KB Output is correct
3 Correct 11 ms 3772 KB Output is correct
4 Correct 20 ms 7124 KB Output is correct
5 Correct 21 ms 7112 KB Output is correct
6 Correct 0 ms 348 KB Output is correct

Subtask #5
15.0 / 15.0

# 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 2 ms 1248 KB Output is correct
4 Correct 10 ms 3864 KB Output is correct
5 Correct 20 ms 7112 KB Output is correct
6 Correct 20 ms 7116 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 6 ms 1744 KB Output is correct
9 Correct 15 ms 5328 KB Output is correct
10 Correct 33 ms 14672 KB Output is correct
11 Correct 37 ms 14664 KB Output is correct
12 Correct 0 ms 344 KB Output is correct

Subtask #6
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 460 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 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 484 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 460 KB Output is correct
13 Correct 1 ms 604 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 348 KB Output is correct

Subtask #7
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 2 ms 604 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 604 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 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 12 ms 3712 KB Output is correct
12 Correct 25 ms 6976 KB Output is correct
13 Correct 24 ms 6988 KB Output is correct
14 Correct 20 ms 6884 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 2 ms 1248 KB Output is correct
17 Correct 13 ms 3820 KB Output is correct
18 Correct 21 ms 7368 KB Output is correct
19 Correct 20 ms 7244 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 3 ms 1884 KB Output is correct
22 Correct 15 ms 5332 KB Output is correct
23 Correct 32 ms 14684 KB Output is correct
24 Correct 36 ms 14676 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 1 ms 604 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 6 ms 1884 KB Output is correct
31 Correct 6 ms 1976 KB Output is correct
32 Correct 20 ms 3676 KB Output is correct
33 Correct 38 ms 8400 KB Output is correct
34 Correct 88 ms 15700 KB Output is correct
35 Correct 41 ms 6996 KB Output is correct
36 Correct 80 ms 16208 KB Output is correct
37 Correct 77 ms 12880 KB Output is correct
38 Correct 0 ms 344 KB Output is correct
39 Correct 68 ms 10344 KB Output is correct
40 Correct 57 ms 14672 KB Output is correct
41 Correct 37 ms 14652 KB Output is correct
42 Correct 48 ms 14672 KB Output is correct