#include<bits/stdc++.h>
using namespace std;
int a,b,c,d;
int main(){
	cin>>a>>b>>c>>d;
	int e=(c-a)*60+d-b;
	cout<<e/60<<" "<<e%60;
	return 0;
}

#include<iostream>
using namespace std;
int main(){
    int h1,h2,m1,m2;
    cin >> h1 >> m1 >> h2 >> m2;
    int h=h2-h1;
    int m = m2-m1;
    if(m<0){
        m+=60;
        h-=1;
    }else if (m==60) {
        m=0;
        h+=1;
    }
    cout << h << ' ' << m;
    return 0;
}

#include <iostream>
using namespace std;
int main(){
    int a,b,c,d,num,min,h;
    cin >> a >> b >> c >> d;
    min = d - b;
    num = (c * 60) - (a * 60) + min;
    h = num / 60;
    min = num % 60;
    cout<< h << " " << min << endl;
    return 0;
}

#include<bits/stdc++.h>
using namespace std;
int main()
{
	int a,b,c,d,e,f;
	cin>>a>>b>>c>>d;//12 50 19 10
	if(a==c)
	{
		cout<<"0"<<" "<<d-b<<endl;
	}
	else if(c>a)
	{
		if(b>d)//50>10
		{
			e=c-a-1;//6
			f=d+60-b;//20
			cout<<e<<" "<<f<<endl;
		}
		else
		{
			e=c-a;
			f=d-b;
			cout<<e<<" "<<f<<endl;
		}
	}
	else
	{
		return 0;
	}
	return 0;
}

#include<iostream>
using namespace std;
int main() {
    int a, b, c, d, e, f, sum1, sum2, time;
    cin >> a >> b >> c >> d;
    sum1 = a * 60 + b;
    sum2 = c * 60 + d;
    time = sum2 - sum1;
    e = time / 60;
    f = time % 60;
    cout << e << " " << f;
    return 0;
}

#include <iostream>#include<cmath>#include<cstdio>using namespace std;int main(){int a,b,c,d;cin>>a>>b>>c>>d;if(b>d)cout<<c-a-1<<" "<<d+60-b;elsecout<<c-a<<" "<<d-b;return 0;}

#include <iostream>
using namespace std;
int main()
{
    int a,b,c,d;
    cin>>a>>b>>c>>d;
    int x=c-a,y=d-b;
    if(y<0){x--;y+=60;}
    cout<<x<<" "<<y;
    return 0;
}

全部化为分钟计算

#include<bits/stdc++.h>
using namespace std;
int main() {
    int a,b,c,d;
    cin>>a>>b>>c>>d;
    b+=a*60;
    d+=c*60;
    int f=d-b;
    int e=f/60;
    f-=e*60;
    cout<<e<<' '<<f;
    return 0;
}

#include<cstdio>
using namespace std;
int main()
{
	int a,b,c,d;
	scanf("%d %d %d %d",&a,&b,&c,&d);
	int e=(c-a)*60+d-b;
	printf("%d %d",e/60,e%60);
	return 0;
}

`

#include <bits/stdc++.h>
using namespace std;
int main()
{
	int a , b , c , d , e , f ;
	cin >> a >> b >> c >> d ;
	e = c - a ;
	f = d - b ;
	if (f < 0){
		e = e - 1 ;
		f = f + 60 ;
	}
	cout << e << " " << f ;
	return 0 ;
}

#include <iostream>

using namespace std;

int a,b,c,d;

int main()

{

cin>>a>>b>>c>>d;

int s=c-a,f=d-b;

if(f<0)

{

s--;f+=60;

}

cout<<s<<" "<<f;

return 0;

}