Compilare: user.cpp: In function ‘int main()’: user.cpp:13:18: warning: unused variable ‘ok’ [-Wunused-variable] bool ok; ^ user.cpp:14:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cmlsc.in","r",stdin); ^ user.cpp:15:44: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cmlsc.out","w",stdout); ^ user.cpp:16:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&m,&n); ^ user.cpp:17:51: 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",&a[i]); ^ user.cpp:18:51: 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",&b[i]); mat[0][0]=0; ^ user.cpp:12:29: warning: ‘p’ may be used uninitialized in this function [-Wmaybe-uninitialized] int m, n, i, j, p, r, x, max; ^