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Submission #863340

# Submission time Handle Problem Language Result Execution time Memory
863340 2023-10-20T05:01:47 Z honanhphong Fancy Fence (CEOI20_fancyfence) C++14
0 / 100
 2 ms 6600 KB 
#include<bits/stdc++.h>
using namespace std;
using lli = long long;
const int mod = 1e9 + 7;
const int maxn = 1e6;
lli s[maxn], h[maxn], w[maxn], b[maxn], c[maxn];
vector <lli> v;
int main()
{
    lli n;
    cin >> n;
    for (lli i = 1; i <= n; i ++)
    {
        cin >> h[i];
    }
    for (lli i = 1; i <= n; i ++)
    {
        cin >> w[i];
    }
    for (lli i = 1; i <= n; i ++)
    {
        s[i] = s[i - 1] + w[i];
    }
    lli k = 0;
    for (lli i = 1; i <= n; i ++)
    {
        while (!v.empty() && h[v.back()] > h[i])
        {
            v.pop_back();
        }
        if (v.empty())
        {
            k ++;
            b[k] = 0;
        } else
        {
            k ++;
            b[k] = s[v.back()];
        }
        v.push_back(i);
    }
    while (!v.empty())
    {
        v.pop_back();
    }
    k = 0;
    for (lli i = n; i >= 1; i --)
    {
        while (!v.empty() && h[v.back()] >= h[i])
        {
            v.pop_back();
        }
        if (v.empty())
        {
            k ++;
            c[k] = s[n] + 1;
        } else
        {
            k ++;
            c[k] = s[v.back()];
        }
        v.push_back(i);
    }
    lli res = 0, j = n;
    for (lli i = 1; i <= n; i ++)
    {
        lli p = (h[i] + 1) * h[i] / 2;
        lli q = (w[i] + 1) * w[i] / 2;
        lli r = c[j] - b[i] - w[i];
        res += (p * q * r);
        res %= mod;
        //cout << res << " " << c[j] << " "  << b[i] << " " << r << endl;
        j --;
    }
    cout << res % mod;
}

Subtask #1
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Incorrect 2 ms 6492 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 6488 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6488 KB Output is correct
2 Incorrect 1 ms 6492 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 6492 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Incorrect 1 ms 6600 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #6
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Incorrect 2 ms 6596 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #7
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Incorrect 2 ms 6492 KB Output isn't correct
3 Halted 0 ms 0 KB -