Compilare: main.cpp: In function 'int main()': main.cpp:38:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(ind<vec[x].size()) ~~~^~~~~~~~~~~~~~ main.cpp:46:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=0;k<=vec[i].size();++k) ~^~~~~~~~~~~~~~~ main.cpp:55:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=0;k<vec[x].size();++k) ~^~~~~~~~~~~~~~ main.cpp:64:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int d=1;d<=vec[x].size();++d) ~^~~~~~~~~~~~~~~