Compilare: main.cpp: In function 'int main()': main.cpp:73:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0;j<v[i].size();j++) ~^~~~~~~~~~~~ main.cpp:75:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k=0;k<v[i+1].size();k++) ~^~~~~~~~~~~~~~ main.cpp:86:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0;j<v[i].size();j++) ~^~~~~~~~~~~~ main.cpp:88:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k=0;k<v[i+1].size();k++) ~^~~~~~~~~~~~~~