#include <bits/stdc++.h> using namespace std; using ll = long long; #define vt vector #define f first #define s second #define all(x) (x).begin(), (x).end() #define FOR(i, a, b) for (int i = (a); i < (b); i++) #define F0R(i, b) FOR(i, 0, b) #define ROF(i, a, b) for (int i = (b) - 1; i >= (a); i--) #define pb push_back #define endl '\n' #ifndef LOCAL #define cerr if (0) std::cerr #endif /* N^3: find max width for each given height */ int rs, cs; vt<vt<bool>> grid; main() { cin.tie(0)->sync_with_stdio(); cin >> rs >> cs; rs += 2, cs += 2; grid.resize(rs, vt<bool>(cs)); FOR (r, 1, rs - 1) { FOR (c, 1, cs - 1) { char ch; cin >> ch; grid[r][c] = ch - '0'; } } int mxw = cs, mxh = rs; F0R (r, rs) { int streak = 0; F0R (c, cs) { if (grid[r][c]) streak++; else if (streak) mxw = min(mxw, streak), streak = 0; } } F0R (c, cs) { int streak = 0; F0R (r, rs) { if (grid[r][c]) streak++; else if (streak) mxh = min(mxh, streak), streak = 0; } } cout << mxw * mxh << endl; }

bomb.cpp:29:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   29 | main() {
      | ^~~~