Compilare: user.cpp: In function ‘void solve()’: user.cpp:21:15: warning: unused variable ‘val’ [-Wunused-variable] long long val; ^ user.cpp: In function ‘void write()’: user.cpp:62:21: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long long int’ [-Wformat=] printf("%d", sol); ^ user.cpp: In function ‘void read()’: user.cpp:13:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sao.in", "r", stdin); ^ user.cpp:14:37: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %lld", &n, &k, &hp); ^ user.cpp:16:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld", &d[i]); ^ user.cpp: In function ‘void write()’: user.cpp:61:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sao.out", "w", stdout); ^