Compilare: main.cpp: In function 'int recurs(int, int)': main.cpp:13:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<q.size(); i++) ~^~~~~~~~~ main.cpp:43:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<q.size(); i++) ~^~~~~~~~~ main.cpp: In function 'int main()': main.cpp:83:45: warning: NULL used in arithmetic [-Wpointer-arith] if (a[i][j]==0&&c[i][j][0]!=NULL) ^~~~