Compilare: main.cpp: In function 'void quickSort(int, int)': main.cpp:17:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (v[i][2] < pivot) ~~~~~~~~^~~~~~~ main.cpp:19:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (v[j][2] > pivot) ~~~~~~~~^~~~~~~ main.cpp: In function 'int main()': main.cpp:77:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v[i+1][3]>max) ~~~~~~~~~^~~~ main.cpp:83:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v[i+1][3]==max) ~~~~~~~~~^~~~~