Compilare: main.cpp: In function 'int choosePiv(std::vector<int>&, int, int)': main.cpp:12:18: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses] if ((v[left] <= v[mid] <= v[right]) || (v[left] >= v[mid] >= v[right])) main.cpp:12:53: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses] if ((v[left] <= v[mid] <= v[right]) || (v[left] >= v[mid] >= v[right])) main.cpp:14:18: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses] if ((v[left] <= v[right] <= v[mid]) || (v[left] >= v[right] >= v[mid])) main.cpp:14:53: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses] if ((v[left] <= v[right] <= v[mid]) || (v[left] >= v[right] >= v[mid])) main.cpp:16:17: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses] if ((v[mid] <= v[left] <= v[right]) || (v[mid] >= v[left] >= v[right])) main.cpp:16:52: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses] if ((v[mid] <= v[left] <= v[right]) || (v[mid] >= v[left] >= v[right])) main.cpp:18:1: warning: control reaches end of non-void function [-Wreturn-type] } ^