Compilare: main.cpp: In function 'int main()': main.cpp:57:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (pos1 < L[t1].size() && pos2 < L[t2].size()){ ~~~~~^~~~~~~~~~~~~~ main.cpp:57:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (pos1 < L[t1].size() && pos2 < L[t2].size()){ ~~~~~^~~~~~~~~~~~~~ main.cpp:68:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (;pos1<L[t1].size();pos1++) ~~~~^~~~~~~~~~~~~ main.cpp:71:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (;pos2<L[t2].size();pos2++) ~~~~^~~~~~~~~~~~~ main.cpp:78:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (idx < aux.size()){ ~~~~^~~~~~~~~~~~ main.cpp:81:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (idx2 < aux.size() && aux[idx2].first <= last+1){ ~~~~~^~~~~~~~~~~~