程序代码：

#include <stdio.h>

unsigned foo( unsigned t )
{
    unsigned minute = (t/100*60 + t%100 + 110)%1440;
    return minute/60*100 + minute%60;
}

int main( void )
{
    printf( "%04u\n", foo(1120) );
    printf( "%04u\n", foo(2230) );
    printf( "%04u\n", foo(2320) );
}