Compilare: main.cpp: In function 'void BFS(int, int)': main.cpp:31:8: warning: this 'if' clause does not guard... [-Wmisleading-indentation] if(a.c-1>=1 and matrix[a.l][a.c-1]==0 and viz[a.l][a.c-1]==0) ^~ main.cpp:33:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if' b.l=a.l%2+1; ^ main.cpp: In function 'int main()': main.cpp:85:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<s.size();i++) ~^~~~~~~~~ main.cpp:88:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<s.size();i++) ~^~~~~~~~~