Compilare: user.cpp: In function ‘long long int caz2()’: user.cpp:23:9: warning: variable ‘pg’ set but not used [-Wunused-but-set-variable] int pg = 0, ph = 0, Maxh = 0, Maxg = 0, g1 = 0, h1 = 0; ^~ user.cpp:23:17: warning: variable ‘ph’ set but not used [-Wunused-but-set-variable] int pg = 0, ph = 0, Maxh = 0, Maxg = 0, g1 = 0, h1 = 0; ^~ user.cpp: In function ‘int main()’: user.cpp:47:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("studenti.in", "r", stdin); ^ user.cpp:48:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("studenti.out", "w", stdout); ^ user.cpp:50:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:52:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &a[i].x, &a[i].y); ^