oj.uz

Submission #1011505

# Submission time Handle Problem Language Result Execution time Memory
1011505 2024-06-30T14:29:22 Z Rifal Fancy Fence (CEOI20_fancyfence) C++14
100 / 100
 24 ms 5604 KB 
#include <bits/stdc++.h>
#include <fstream>
#define endl '\n'
#define mod 1000000007
#define INF 1000000000
#define INF2 2000000000000000000
//#define ll long long
///#define cin fin
///#define cout fout
using namespace std;
double const EPS = 1e-14;
///ofstream fout("herding.out");
///ifstream fin("herding.in");

int main()
{
    ios_base::sync_with_stdio(0);cout.tie(0);cin.tie(0);
    int n; cin >> n; long long h[n], w[n];
    for(int i = 0; i < n; i++) cin >> h[i];
    for(int i = 0; i < n; i++) cin >> w[i];
    stack<pair<long long, long long>> st;
    long long ans = 0, nw = 0;
    for(int i = 0; i < n; i++) {
         nw = 0;
        while(!st.empty() && st.top().first > h[i]) {
            pair<long long, long long> now = st.top();
            nw += now.second;
            nw %= mod;
            st.pop();
            ans += (((now.first*(now.first+1))/2%mod) * ((nw*(nw+1))/2%mod)%mod);
          //  cout << (((now.first*(now.first+1))/2%mod) * ((nw*(nw+1))/2%mod)%mod) << 'a' << endl;
            ans %= mod;
            if(!st.empty() && st.top().first > h[i]) {
                ans -= ((st.top().first*(st.top().first+1))/2%mod) * ((nw*(nw+1))/2%mod)%mod;
           //     cout << ((st.top().first*(st.top().first+1))/2%mod) * ((nw*(nw+1))/2%mod)  << 'b'<< endl;
                ans += mod;
                ans %= mod;
            }
            else {
                ans -= ((h[i]*(h[i]+1))/2%mod) * ((nw*(nw+1))/2%mod)%mod;
                ans += mod;
                ans %= mod;
            }
        }

        st.push({h[i],w[i]+nw});
       // cout << h[i] << ' ' << w[i]+nw << 's' << endl;
    }
    nw = 0;
        while(!st.empty()) {
            pair<long long, long long> now = st.top();
            nw += now.second;
            nw %= mod;
            st.pop();
            ans += (((now.first*(now.first+1))/2%mod) * ((nw*(nw+1))/2%mod)%mod);
           // cout << (((now.first*(now.first+1))/2%mod) * ((nw*(nw+1))/2%mod)%mod) << 'c' << endl;
            ans %= mod;
            if(!st.empty()) {
                ans -= ((st.top().first*(st.top().first+1))/2%mod) * ((nw*(nw+1))/2%mod)%mod;
              //  cout << ((st.top().first*(st.top().first+1))/2%mod) * ((nw*(nw+1))/2%mod)%mod << 'd' << endl;
                ans += mod;
                ans %= mod;
            }
        }
    cout << ans%mod << endl;
    return 0;
}

Subtask #1
0.0 / 0.0

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

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 344 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 6 ms 2124 KB Output is correct
4 Correct 12 ms 4300 KB Output is correct
5 Correct 13 ms 3668 KB Output is correct
6 Correct 13 ms 3156 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 3 ms 800 KB Output is correct
3 Correct 11 ms 3028 KB Output is correct
4 Correct 17 ms 5460 KB Output is correct
5 Correct 16 ms 5460 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 860 KB Output is correct
4 Correct 13 ms 3028 KB Output is correct
5 Correct 16 ms 5464 KB Output is correct
6 Correct 16 ms 5464 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 2 ms 860 KB Output is correct
9 Correct 8 ms 3144 KB Output is correct
10 Correct 21 ms 5320 KB Output is correct
11 Correct 16 ms 5464 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 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
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 348 KB Output is correct
11 Correct 0 ms 452 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 456 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 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 492 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 0 ms 484 KB Output is correct
11 Correct 6 ms 1984 KB Output is correct
12 Correct 13 ms 4444 KB Output is correct
13 Correct 14 ms 3656 KB Output is correct
14 Correct 13 ms 3164 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 3 ms 968 KB Output is correct
17 Correct 8 ms 2908 KB Output is correct
18 Correct 17 ms 5604 KB Output is correct
19 Correct 17 ms 5468 KB Output is correct
20 Correct 1 ms 600 KB Output is correct
21 Correct 2 ms 724 KB Output is correct
22 Correct 13 ms 3008 KB Output is correct
23 Correct 18 ms 5456 KB Output is correct
24 Correct 16 ms 5468 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 3 ms 604 KB Output is correct
31 Correct 2 ms 604 KB Output is correct
32 Correct 7 ms 1884 KB Output is correct
33 Correct 11 ms 2136 KB Output is correct
34 Correct 14 ms 3668 KB Output is correct
35 Correct 20 ms 3672 KB Output is correct
36 Correct 15 ms 3932 KB Output is correct
37 Correct 17 ms 3932 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 18 ms 3792 KB Output is correct
40 Correct 13 ms 3932 KB Output is correct
41 Correct 15 ms 4048 KB Output is correct
42 Correct 24 ms 4688 KB Output is correct