Compilare: user.cpp: In function ‘int main()’: user.cpp:47:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] (i == v.size() - 1) ? (b - v[i].val) : (v[i + 1].val - v[i].val - 1); ^ user.cpp:55:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v.size(); ++i) { ^ user.cpp:69:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v.size(); ++i) { ^