func_code_string: #include <bits/stdc++.h>   using namespace std;   const long long MOD = 1e9 + 7;   const int iinf = 1 << 29;   const long long llinf = 1ll << 60;   const double PI = 3.14159265;   mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());   long long mrand(long long B) { return (unsigned long long)rng() % B; }   long long cross(pair<long long, long long> p1, pair<long long, long long> p2) {     return p1.first * p2.second - p2.first * p1.second;   }   bool online(pair<long long, long long> a, pair<long long, long long> b,               pair<long long, long long> c) {     pair<long long, long long> p1{b.first - a.first, b.second - a.second};     pair<long long, long long> p2{c.first - a.first, c.second - a.second};     return cross(p1, p2) == 0;   }   void z_func(vector<int> &z, vector<int> &s, int n) {     int L = 0, R = 0;     for (int i = 1; i < n; i++) {       if (i > R) {         L = R = i;         while (R < n && s[R - L] == s[R]) R++;         z[i] = R - L;         R--;       } else {         int k = i - L;         if (z[k] < R - i + 1)           z[i] = z[k];         else {           L = i;           while (R < n && s[R - L] == s[R]) R++;           z[i] = R - L;           R--;         }       }     }   }   const int MXN = 400;   long long ans;   int n, m;   int v[MXN][MXN], up[MXN][MXN], down[MXN][MXN], leftt[MXN][MXN],       rightt[MXN][MXN], ul[MXN][MXN], ur[MXN][MXN], lol[MXN][MXN], lr[MXN][MXN];   void populate() {     for (int i = 0; i < n; ++i) {       for (int j = 0; j < m; ++j) {         if (!v[i][j]) continue;         if (i && v[i - 1][j]) up[i][j] = 1 + up[i - 1][j];         if (j && v[i][j - 1]) leftt[i][j] = 1 + leftt[i][j - 1];         if (i && j && v[i - 1][j - 1]) ul[i][j] = 1 + ul[i - 1][j - 1];         if (i && j != m - 1 && v[i - 1][j + 1]) ur[i][j] = 1 + ur[i - 1][j + 1];       }     }     for (int i = n - 1; i >= 0; --i) {       for (int j = m - 1; j >= 0; --j) {         if (!v[i][j]) continue;         if (i != n - 1 && v[i + 1][j]) down[i][j] = 1 + down[i + 1][j];         if (j != m - 1 && v[i][j + 1]) rightt[i][j] = 1 + rightt[i][j + 1];         if (i != n - 1 && j != m - 1 && v[i + 1][j + 1])           lr[i][j] = 1 + lr[i + 1][j + 1];         if (i != n - 1 && j && v[i + 1][j - 1]) lol[i][j] = 1 + lol[i + 1][j - 1];       }     }   }   void do_lower_leftt(int x, int y) {     for (int i = x + 1, j = y - 1; i < n && j >= 0 && v[i][j]; ++i, --j) {       ans += down[x][y] >= 2 * (i - x) && lr[i][j] >= i - x;       ans += down[x][y] >= i - x && rightt[i][j] >= y - j;       ans += lr[x][y] >= i - x && rightt[i][j] >= 2 * (y - j);     }   }   void do_down(int x, int y) {     for (int i = x + 1; i < n && v[i][y]; ++i) {       ans += lr[x][y] >= i - x && rightt[i][y] >= i - x;       ans += rightt[x][y] >= i - x && ur[i][y] >= i - x;       ans +=           (i - x) % 2 == 0 && lr[x][y] >= (i - x) / 2 && ur[i][y] >= (i - x) / 2;     }   }   void do_lower_rightt(int x, int y) {     for (int i = x + 1, j = y + 1; i < n && j < m && v[i][j]; ++i, ++j) {       ans += rightt[x][y] >= j - y && up[i][j] >= i - x;       ans += rightt[x][y] >= 2 * (j - y) && ur[i][j] >= i - x;     }   }   void work() {     cin >> n >> m;     for (int i = 0; i < n; ++i)       for (int j = 0; j < m; ++j) {         char c;         cin >> c;         while (c !=  0  && c !=  1 ) cin >> c;         v[i][j] = c ==  0  ? 1 : 0;       }     populate();     for (int i = 0; i < n; ++i) {       for (int j = 0; j < m; ++j) {         if (!v[i][j]) continue;         do_lower_leftt(i, j);         do_down(i, j);         do_lower_rightt(i, j);       }     }     cout << ans << endl;   }   int main() {     ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);     work();     return 0;   }   