Compilare: user.cpp: In function ‘int binarySearch(int, int)’: user.cpp:51:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i + step < v2.size () && (v2 [i + step].a < a || (v2 [i + step].a == a && v2 [i + step].t < t))) ^ user.cpp: In function ‘int main()’: user.cpp:81:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 1; i < v.size (); ++ i) ^ user.cpp:91:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < v2.size () - 1; ++ i) { ^ user.cpp:116:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (num == v2.size ()) ^ user.cpp:119:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 1; i < v2.size (); ++ i) ^