Compilare: main.cpp: In function 'int main()': main.cpp:40:74: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ok[y] and !ext[y] and !inq[y] and (val[y]==0 or val[y]>vec[y].size()-fr[y])) ~~~~~~^~~~~~~~~~~~~~~~~~~~ main.cpp:44:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(val[x]==0 or val[x]>vec[x].size()-fr[x]) ~~~~~~^~~~~~~~~~~~~~~~~~~~