Compilare: user.cpp: In function ‘int main()’: user.cpp:15:24: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[505]’ [-Wformat=] scanf("%d %s",&n,&a); ^ user.cpp:18:20: warning: overflow in implicit constant conversion [-Woverflow] d[i][j]=INF; ^ user.cpp:12:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("redu.in","r",stdin); ^ user.cpp:13:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("redu.out","w",stdout); ^ user.cpp:15:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %s",&n,&a); ^ user.cpp:23:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&c[i][j]); ^