Add some basic problems on lightoj.com

lightoj.com/1012.cpp

@@ -0,0 +1,42 @@
+#include <cstdio>
+#include <cstring>
+#include <cmath>
+#include <iostream>
+#include <algorithm>
+
+#define MAX 20
+
+using namespace std;
+
+void solve(char s[][MAX], int w, int h, int sx, int sy, int &m){
+    if(s[sx][sy] == '@' || s[sx][sy] == '.'){
+        s[sx][sy] = '#';
+        m++;
+        solve(s, w, h, max(sx - 1, 0), sy, m);
+        solve(s, w, h, min(sx + 1, h - 1), sy, m);
+        solve(s, w, h, sx, max(sy - 1, 0), m);
+        solve(s, w, h, sx, min(sy + 1, w - 1), m);
+    }
+}
+
+int main(){
+    int t, w, h;
+    scanf("%d", &t);
+    for(int i = 1; i <= t; i++){
+        scanf("%d %d", &w, &h);
+        char s[h][MAX];
+        int sx, sy;
+        for(int j = 0; j < h; j++){
+            scanf("%s", &s[j]);
+            for(int jj = 0; jj < strlen(s[j]); jj++){
+                if(s[j][jj] == '@'){
+                    sx = j;
+                    sy = jj;
+                }
+            }
+        }
+        int m = 0;
+        solve(s, w, h, sx, sy, m);
+        printf("Case %d: %d\n", i, m);
+    }
+}