minuti i sekundi

#include<stdio.h>
int main ()
{
int m1,s1,m2,s2;
scanf("%d%d%d%d",&m1,&s1,&m2,&s2);
if(m1<0 || m1>60 || s1<0 || s1>60 ||m2<0 || m2>60 || s2<0 || s2>60)
printf("NE\n");
else
{
    printf("DA\n");

    if(m1>m2 && s1>s2)
    printf("%d %d",m1-m2, s1-s2);
    else if(m1<m2 && s1<s2)
    printf("%d %d",m2-m1, s2-s1);
    else if(m1>m2 && s1<s2)
     printf("%d %d",m1-m2, s2-s1);
     else if (m1<m2 && s1>s2)
      printf("%d %d",m2-m1, s1-s2);
      else
       printf("%d %d",m1-m2, s1-s2);

}
 return 0;
}