Submission #170796

#	Time	Username	Problem	Language	Result	Execution time	Memory
170796		BigChungus	Strah (COCI18_strah)	C++14	110 / 110	142 ms	4344 KiB

strah

#include <bits/stdc++.h>

using namespace std;

#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;

#define ordered_set tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update>

const int N = 2009;

struct Nod {
    int left, right;
    int g;///greutatea
};

int dp[N];
Nod v[N];
int stk[N];
long long ans;
string s;

void dfs(int nod) {
    if (nod == 0)
        return;
    dfs(v[nod].left);
    dfs(v[nod].right);
    int n(v[v[nod].left].g), m(v[v[nod].right].g);
    v[nod].g = n + m + 1;
    ans += 1LL * dp[nod] * (dp[nod] + 1) / 2 * (n + 1) * (m + 1) * (1.0 * n / 2 + 1.0 * m / 2 + 1);
}

int main()
{
    ios_base::sync_with_stdio(NULL);
    cin.tie(0);
    cout.tie(0);
    int n, m;
    cin >> n >> m;
    for (int i = 1; i <= n; ++i) {
        cin >> s;
        s = '$' + s;
        for (int j = 1; j <= m; ++j) {
            if (s[j] == '#')
                dp[j] = 0;
            else
                dp[j]++;
        }
        memset(v, 0, sizeof v);
        int top(0);
        for (int j = 1; j <= m; ++j) {///acum parctic trebuie sa construiesc arborele cartezian
            while (top && dp[stk[top]] > dp[j])
                --top;
            v[j].left = v[stk[top]].right;
            v[stk[top]].right = j;
            stk[++top] = j;
        }
        dfs(stk[1]);
    }
    cout << ans;
    return 0;
}
/*
2 3
.#.
..#
*/

• Subtask 1: 11 / 11
• Subtask 2: 11 / 11
• Subtask 3: 11 / 11
• Subtask 4: 11 / 11
• Subtask 5: 11 / 11
• Subtask 6: 11 / 11
• Subtask 7: 11 / 11
• Subtask 8: 11 / 11
• Subtask 9: 11 / 11
• Subtask 10: 11 / 11