Compilare: user.cpp: In function ‘int main()’: user.cpp:83:15: warning: unused variable ‘P’ [-Wunused-variable] long long P = bsearch(); ^ user.cpp: In function ‘void read()’: user.cpp:28:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &N, &K); ^ user.cpp:30:41: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &S[i].b, &S[i].a); ^