0_0_29946906_30927.cpp: In function 'int DFS(int, int)': 0_0_29946906_30927.cpp:56:10: error: 'x' was not declared in this scope sign[x][y]=0; ^ 0_0_29946906_30927.cpp:56:13: error: 'y' was not declared in this scope sign[x][y]=0; ^