Compilare: main.cpp: In function 'int read()': main.cpp:29:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int reset()': main.cpp:38:26: warning: operation on 'viz[(n + 1)][i]' may be undefined [-Wsequence-point] viz[0][i]=viz[n+1][i]=viz[i][0]=viz[n+1][i]=1; ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:39:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int bfs1(int)': main.cpp:58:9: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if( !viz[f.x+dx[i]][f.y+dy[i]] ) ^