Compilare: user.cpp: In function ‘void solve()’: user.cpp:56:10: warning: variable ‘cmp’ set but not used [-Wunused-but-set-variable] auto cmp = [& ] (const PII & a , const PII & b) { ^ user.cpp:61:9: warning: unused variable ‘fi’ [-Wunused-variable] int fi = 0 , u = 1; ^ user.cpp:61:18: warning: unused variable ‘u’ [-Wunused-variable] int fi = 0 , u = 1; ^ user.cpp: In function ‘void citire()’: user.cpp:24:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zmeu2.in", "r", stdin); ^ user.cpp:25:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%hd %hd %hd", &n, &p , &k); ^ user.cpp:27:47: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%hd %hd", &v[i].X, &v[i].Y); ^ user.cpp:33:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%hd %hd", &x , &y); ^ user.cpp: In function ‘void solve()’: user.cpp:46:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zmeu2.out", "w", stdout); ^