Compilare: main.cpp:1:0: warning: ignoring #pragma unroll [-Wunknown-pragmas] #pragma unroll main.cpp: In function 'int main()': main.cpp:36:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0;i < oldV.size();++i) { ~~^~~~~~~~~~~~~ main.cpp:52:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ptr < newV.size() && newV[ptr].first == i) { ~~~~^~~~~~~~~~~~~