Compilare: user.cpp: In function ‘int main()’: user.cpp:20:12: warning: unused variable ‘maxim’ [-Wunused-variable] int n, maxim, minim, unu, doi, res = 1; ^ user.cpp:20:19: warning: unused variable ‘minim’ [-Wunused-variable] int n, maxim, minim, unu, doi, res = 1; ^ user.cpp:33:9: warning: variable ‘st’ set but not used [-Wunused-but-set-variable] int st = reac[0].st, dr = reac[0].dr; ^ user.cpp:22:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("reactivi.in", "r", stdin); ^ user.cpp:23:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("reactivi.out", "w", stdout); ^ user.cpp:25:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:29:48: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &reac[i].st, &reac[i].dr); ^