Compilare: main.cpp: In function 'int main()': main.cpp:141:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<=5*path[i].size();j++) ~^~~~~~~~~~~~~~~~~~ main.cpp:144:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<path[i].size();j++) ~^~~~~~~~~~~~~~~ main.cpp:154:14: warning: variable 'ok' set but not used [-Wunused-but-set-variable] bool ok=0; ^~