Compilare: user.cpp: In function ‘void solve()’: user.cpp:111:11: warning: unused variable ‘cx’ [-Wunused-variable] ^ user.cpp: In function ‘void read()’: user.cpp:28:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bombe.in", "r", stdin); ^ user.cpp:29:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %lf", &N, &D); D*=2; ^ user.cpp:35:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] p.pb(mp(x, v)); ^ user.cpp: In function ‘int main()’: user.cpp:140:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] printf("%d %0.3lf\n", minbombs, mint); ^