Submission #81699

#	Time	Username	Problem	Language	Result	Execution time	Memory
81699		Saboon	Strah (COCI18_strah)	C++14	110 / 110	170 ms	7992 KiB

strah

#include <iostream>
#include <sstream>
#include <queue>
#include <stack>
#include <vector>
#include <cstring>
#include <cmath>
#include <map>
#include <unordered_map>
#include <set>
#include <algorithm>
#include <iomanip>
#define F first
#define S second
#define PB push_back
#define PF push_front
#define MP make_pair
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int,int> pii;
const int maxn = 1e5 + 37;

int n, m;
int a[maxn];

int l[maxn], r[maxn];

ll sum (ll fi, ll se) {
    return se * (se + 1) / 2 - fi * (fi + 1) / 2;
}

ll get () {
    stack <int> s;
    for (int i = m - 1; i >= 0; i--) {
        while (!s.empty() and a[s.top()] >= a[i])
            s.pop();
        if (!s.empty())
            r[i] = s.top();
        else
            r[i] = m;
        s.push (i);
    }
    while (!s.empty())
        s.pop();
    for (int i = 0; i < m; i++) {
        while (!s.empty() and a[s.top()] > a[i])
            s.pop();
        if (!s.empty())
            l[i] = s.top();
        else
            l[i] = -1;
        s.push (i);
    }

    ll ret = 0;
    for (int i = 0; i < m; i++) {
        ll cnt = sum (i - 1, r[i] - 1) * (i - l[i]) + (r[i] - i) * (i - l[i]);
        cnt -= sum (l[i], i) * (r[i] - i);
        ret += a[i] * (a[i] + 1) * cnt / 2;
    }
    return ret;
}

string s[maxn];
int main() {
    ios_base::sync_with_stdio(false);
    cin >> n >> m;
    for (int i = 0; i < n; i++)
        cin >> s[i];
    ll ans = 0;
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            if (s[i][j] == '#')
                a[j] = 0;
            else
                a[j] ++;
        }
        ans += get ();
    }
    cout << ans << endl;
}

• 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