0_0_30272817_15225.cpp: In function 'void dfs(int, int)':
0_0_30272817_15225.cpp:27:5: error: 'vis' was not declared in this scope
vis[x][y]=1;
^
0_0_30272817_15225.cpp: In function 'int main()':
0_0_30272817_15225.cpp:39:16: error: 'vis' was not declared in this scope
memset(vis,0,sizeof(vis));
^
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