Compilare: user.cpp: In function ‘void read()’: user.cpp:59:13: warning: unused variable ‘x’ [-Wunused-variable] int x, y; ^ user.cpp:59:16: warning: unused variable ‘y’ [-Wunused-variable] int x, y; ^ user.cpp: In function ‘void solve()’: user.cpp:72:9: warning: unused variable ‘x’ [-Wunused-variable] int x, p = 1, q = 1, ly; ^ user.cpp:72:26: warning: unused variable ‘ly’ [-Wunused-variable] int x, p = 1, q = 1, ly; ^ user.cpp: In function ‘void read()’: user.cpp:56:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:60:53: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &v[i].x, &v[i].y, &v[i].d); ^