#include<iostream>
#include<string>
#include<windows.h>
#include<ctime>
#include<cstdlib>
using namespace std;

void beginmain()
{
	#define a int
	#define b long long
	#define c double
	#define d char
	#define e string
	#define f cin
	#define g cout
	#define h <<
	#define i >>
	#define j endl
	#define k ;
	#define l ,
	#define m =
	#define n +
	#define o -
	#define p *
	#define q /
	#define r (
	#define s )
	#define t " "
}


int main()
{
	beginmain();
	b s1 l s2 l m1 l m2 l h1 l h2 k
	d tmp k
	f i h1 i tmp i m1 i tmp i s1 k
	f i h2 i tmp i m2 i tmp i s2 k
	b ss1 l ss2 k
	ss1 m r h1 p 3600 n m1 p 60 n s1 s k
	ss2 m r h2 p 3600 n m2 p 60 n s2 s k
	b per k
	f i per k
	g h r ss2 o ss1 s p per h j k
	return 0;
}

见谷P1615