Compilare: user.cpp: In function ‘int main()’: user.cpp:59:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("peste.in","r",stdin); ^ user.cpp:60:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("peste.out","w",stdout); ^ user.cpp: In function ‘void citeste()’: user.cpp:12:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &k, &tt); ^ user.cpp:13:64: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for (i=1;i<=n;i++) scanf("%d%d", &a[i].second, &a[i].first); ^ user.cpp:24:23: warning: ‘dr’ may be used uninitialized in this function [-Wmaybe-uninitialized] mij=st+(dr-st)/2; ^ user.cpp:24:23: warning: ‘st’ may be used uninitialized in this function [-Wmaybe-uninitialized]