Submission #227923

#	Time	Username	Problem	Language	Result	Execution time	Memory
227923		Vimmer	Strah (COCI18_strah)	C++14	55 / 110	1099 ms	20352 KiB

strah

#include <bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>

//#pragma GCC optimize("unroll-loops")
//#pragma GCC optimize("-O3")
//#pragma GCC optimize("Ofast")
//#pragma GCC optimize("fast-math")
//#pragma GCC optimize("no-stack-protector")

#define F first
#define S second
#define sz(x) int(x.size())
#define pb push_back
#define N 2005
#define M ll(1e9 + 7)

using namespace std;

//using namespace __gnu_pbds;

typedef long double ld;

typedef long long ll;

typedef short int si;

//typedef tree<int, null_type, less <int>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;

int n, m, pr[N][N];

ll ans;

bool gd(int i, int j, int a, int b)
{
    int sm = pr[i + a - 1][j + b - 1];

    if (i != 0) sm -= pr[i - 1][j + b - 1];

    if (j != 0) sm -= pr[i + a - 1][j - 1];

    if (i != 0 && j != 0) sm += pr[i - 1][j - 1];

    return sm == 0;
}
int main()
{
    //freopen("input.txt", "r", stdin); freopen("output.txt", "w", stdout);

    ios_base::sync_with_stdio(0); istream::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    cin >> n >> m;

    string s[n];

    for (int i = 0; i < n; i++) cin >> s[i];

    for (int i = 0; i < n; i++)
      for (int j = 0; j < m; j++)
      {
          if (i != 0) pr[i][j] += pr[i - 1][j];

          if (j != 0) pr[i][j] += pr[i][j - 1];

          if (i != 0 && j != 0) pr[i][j] -= pr[i - 1][j - 1];

          if (s[i][j] == '#') pr[i][j]++;
      }

   for (int i = 0; i < n; i++)
    for (int j = 0; j < m; j++)
    {
        int y = m - j;

        for (int a = 1; a <= n - i; a++)
        {
            while (y > 0 && !gd(i, j, a, y)) y--;

            ll s = y, st = a;

            s = (s * (s + 1)) / 2;

            ans += s * st;
        }
    }
    cout << ans << endl;
}

Compilation message (stderr)

strah.cpp: In function 'int main()':
strah.cpp:70:4: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
    for (int i = 0; i < n; i++)
    ^~~
strah.cpp:86:5: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
     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: 0 / 11
• Subtask 7: 0 / 11
• Subtask 8: 0 / 11
• Subtask 9: 0 / 11
• Subtask 10: 0 / 11