Compilare: main.cpp: In function 'int main()': main.cpp:28:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] {for(j=0;j<V[a[i]].size();j++) ~^~~~~~~~~~~~~~~ main.cpp:39:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] {for(k=0;k<V[a[i]].size();k++) ~^~~~~~~~~~~~~~~ main.cpp:43:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k=0;k<V[a[j]].size();k++) ~^~~~~~~~~~~~~~~ main.cpp:45:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k1=0;k1<V[a[i]].size();k1++) ~~^~~~~~~~~~~~~~~ main.cpp:53:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] {for(k=0;k<V[a[k2]].size();k++) ~^~~~~~~~~~~~~~~~ main.cpp:55:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k=0;k<V[a[k2]].size();k++) ~^~~~~~~~~~~~~~~~ main.cpp:57:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k1=0;k1<acum.size();k1++) ~~^~~~~~~~~~~~