Compilare: main.cpp: In function 'int main()': main.cpp:24:20: warning: logical not is only applied to the left hand side of comparison [-Wlogical-not-parentheses] while (!d.size() > 2 && v[d.back()] < v[i] && v[d.front()] < v[i]) ^ main.cpp:24:20: warning: comparison of constant '2' with boolean expression is always false [-Wbool-compare] while (!d.size() > 2 && v[d.back()] < v[i] && v[d.front()] < v[i]) ~~~~~~~~~~^~~ main.cpp:34:20: warning: logical not is only applied to the left hand side of comparison [-Wlogical-not-parentheses] while (!d.size() > 2 && v[d.back()] < v[i] && v[d.front()] < v[i]) ^ main.cpp:34:20: warning: comparison of constant '2' with boolean expression is always false [-Wbool-compare] while (!d.size() > 2 && v[d.back()] < v[i] && v[d.front()] < v[i]) ~~~~~~~~~~^~~