X49545 - Menacing Bishops

#include <iostream>
#include <vector>
using namespace std;

typedef vector<char> Row;
typedef vector<Row> Board;

Board read_board(int n) {
   Board b(n, Row(n));
   for (int i = 0; i < n; ++i) {
      for (int j = 0; j < n; ++j) {
          cin >> b[i][j];
      }
   }
   return b;
}

void write_menace(int i1, int j1, int i2, int j2) {
   cout << "(" << i1 << "," << j1 << ") <--> (" << i2 << "," << j2 << ")" <<endl;
}

void find_menaces(const Board & b, int ib, int jb) {
    int n = b.size();
    int i = ib;
    int j = jb;
    bool found = false;
    while (i < n-1 and j > 0 and not found){
//        BOTTOM LEFT
        ++i;
        --j;
        if (b[i][j] == 'B'){
            found = true;
            write_menace(ib, jb, i, j);
        }
    }
    i = ib;
    j = jb;
    found = false;
    while (i < n-1 and j < n-1 and not found){
//        BOTTOM RIGHT
        ++i;
        ++j;
        if (b[i][j] == 'B'){
            found = true;
            write_menace(ib, jb, i, j);
        }
    }
}

void check_board(const Board& b) {
    int n = b.size();
    for (int i = 0; i < n; ++i){
        for (int j = 0; j < n; ++j){
            if (b[i][j] == 'B') find_menaces(b, i, j);
        }
    }
}

int main() {
   int n;
   int bn = 1;
   while (cin >> n) {
      Board b = read_board(n);
      cout << "board num " << bn << endl;
      ++bn;
      check_board(b);
      cout << "----------------" << endl;
   }
}