Compilare: main.cpp: In function 'int partitie(int, int)': main.cpp:18:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v[j].first<=pivot) ~~~~~~~~~~^~~~~~~ main.cpp: In function 'int main()': main.cpp:45:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=u;i<=x;i+=l2) ~^~~ main.cpp:47:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;v[d].first<=i&&d<=n;++d) ~~~~~~~~~~^~~