Compilare: user.cpp: In function ‘int main()’: user.cpp:19:18: warning: unused variable ‘j’ [-Wunused-variable] int n, m, i, j, indi, dim, maxi, x, y; ^ user.cpp:19:27: warning: unused variable ‘dim’ [-Wunused-variable] int n, m, i, j, indi, dim, maxi, x, y; ^ user.cpp:16:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("secvmin.in","r",stdin); ^ user.cpp:17:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("secvmin.out","w",stdout); ^ user.cpp:21:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:22:50: 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",&a[ i ]); ^ user.cpp:23:50: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for( i = 1; i <= m; ++i ) scanf("%d",&b[ i ]); ^ user.cpp:41:19: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] if( y - x + 1 > maxi ) maxi = y - x + 1; ^