UVa 469 - Wetlands of Florida

/*
Lionel Messi is such a player that you may catch him, you may touch him, you may feel him
and definitely you may Love him.
Lionel Messi is Messi. A little Magician in this World.

*/

// Accepted
// Algorithm: DFS

#include<bits/stdc++.h>

using namespace std;

#define fast ios_base::sync_with_stdio(0)
#define bfast cin.tie(0)
#define outs(x) cout << x << " "
#define outn(x) cout << x << "\n"
#define sf scanf
#define pf printf
#define nl puts("")
#define psb push_back
#define mset(c,v) memset(c , v , sizeof c)
#define loop0(n) for(int i=0; i<n; i++)
#define loop1(n) for(int i=1; i<=n; i++)
#define mpair(x , y) make_pair(x , y)
#define all(x) x.begin(), x.end()
#define pi acos(-1.0)
#define psb push_back

typedef unsigned long long ull;
typedef long long LL;
typedef vector<int>vii;
typedef vector<LL>vll;
typedef vector<string>vs;
typedef map<int, int>mpii;
typedef map<string, int>mpsi;
typedef map<char, int>mpci;
typedef map<LL, LL>mpll;

const int mod = 1000007;
const int high = 1001;

char adj[101][101] , matrix[101][101] , str[high];
int R, C , area = 0;

void DFS(int x , int y)
{
    if(x < 0 || x >= R || y < 0 || y >= C) return;

    if(adj[x][y] != 'W') return;

    if(adj[x][y] == 'W') adj[x][y] = 'L';

        area++;

    DFS(x+1, y);
    DFS(x-1, y);
    DFS(x, y+1);
    DFS(x, y-1);
    DFS(x+1, y+1);
    DFS(x+1, y-1);
    DFS(x-1, y+1);
    DFS(x-1, y-1);
}

int main()
{
    //freopen("out.txt" , "w" , stdout);
    int test , tc , i , j , x , y;
    sf("%d", &test);
    getchar();
    getchar();
    for(tc=0; tc<test; tc++)
    {
        R = C = 0;

        if(tc) pf("\n");

        while(gets(str) && strlen(str) > 0)
        {
            if(str[0] == 'L' || str[0] == 'W')
            {
                strcpy(matrix[R] , str);

                C = strlen(str);

                R++;
            }

            else
            {
                sscanf(str , "%d %d", &x , &y);

                area = 0;

                //cout << x << " " << y << "\n";

                for(i=0; i<R; i++)
                {
                    for(j=0; j<C; j++)
                    {
                        //cout << adj[i][j] << "; ";
                        adj[i][j] = matrix[i][j];
                    }

                    //cout << "\n";
                }

                DFS(x-1, y-1);

                pf("%d\n" , area);
            }
        }
    }

    return 0;
}