Compilare: user.cpp: In function ‘int main()’: user.cpp:75:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < horiz.size(); ++i) ^ user.cpp:76:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < vert.size(); ++j) ^ user.cpp:80:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < horiz.size(); ++i) ^ user.cpp:81:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = i+1; j < horiz.size(); ++j) { ^ user.cpp:84:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = 0; k < vert.size(); ++k) { ^ user.cpp:79:26: warning: unused variable ‘dist_x1’ [-Wunused-variable] LL d = INF, local_d, dist_x1, dist_x2, dist_y1, dist_y2, min1, min2; ^ user.cpp:79:35: warning: unused variable ‘dist_x2’ [-Wunused-variable] LL d = INF, local_d, dist_x1, dist_x2, dist_y1, dist_y2, min1, min2; ^ user.cpp:79:44: warning: unused variable ‘dist_y1’ [-Wunused-variable] LL d = INF, local_d, dist_x1, dist_x2, dist_y1, dist_y2, min1, min2; ^ user.cpp:79:53: warning: unused variable ‘dist_y2’ [-Wunused-variable] LL d = INF, local_d, dist_x1, dist_x2, dist_y1, dist_y2, min1, min2; ^