Compilare: user.cpp: In function ‘int main()’: user.cpp:52:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("amedie.in", "r", stdin); ^ user.cpp:53:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("amedie.out", "w", stdout); ^ user.cpp:56:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d %d", &n, &m, &q); ^ user.cpp:62:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &v[i][j]); ^ user.cpp:82:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("\n%c", &op); ^ user.cpp:87:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &x); ^ user.cpp:98:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &x); ^ user.cpp:36:20: warning: ‘poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] int grp = (poz - 1) / lg + 1; ^ user.cpp:20:25: note: ‘poz’ was declared here int st = 1, dr = p, poz; ^ user.cpp:36:20: warning: ‘poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] int grp = (poz - 1) / lg + 1; ^ user.cpp:20:25: note: ‘poz’ was declared here int st = 1, dr = p, poz; ^ user.cpp:109:20: warning: ‘rez’ may be used uninitialized in this function [-Wmaybe-uninitialized] int x = 0, rez, sol = 2000000000; ^