Codeforces Round #254 (Div. 2), problem: (A) DZY Loves Chessboard solution

Codeforces Round #254 (Div. 2), problem: (A) DZY Loves Chessboard: http://codeforces.com/problemset/problem/445/A

Codeforces Round #254 (Div. 2), problem: (A) DZY Loves Chessboard editorial: not shared yet (at the time publishing this post)

Codeforces Round #254 (Div. 2), problem: (A) DZY Loves Chessboard solution: http://ideone.com/HiBH3H

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

int main() {
    int n, m;
    char s[105][105];
    vector <string> v;
    scanf("%d%d", &n, &m);
    for(int i=0; i<n; i++) scanf("%s", s[i]);
    for(int i=0; i<n; i++) {
        string d="";
        for(int j=0; j<m; j++) {
            if(s[i][j]=='.' && j%2==0 && i%2==0) d+='B';
            else if(s[i][j]=='.' && j%2==0 && i%2==1) d+='W';
            else if(s[i][j]=='.' && j%2==1 && i%2==0) d+='W';
            else if(s[i][j]=='.' && j%2==1 && i%2==1) d+='B';
            else d+='-';
        }
        v.push_back(d);
    }
    for(vector <string>::iterator i=v.begin(); i!=v.end(); i++) cout<<*i<<endl;
    return 0;
}