import java.io.*;
import java.text.SimpleDateFormat;
import java.util.*;
public class Main {
static int n,p,cnt=1;
static String[] arr;
static Scanner scan=new Scanner(System.in);
static StringBuilder sb=new StringBuilder();
public static void main(String[] args) {
String str=scan.next();
int index=str.indexOf(':');
int hour = Integer.parseInt(str.substring(0,index));
String tmp=str.substring(index+1,str.length());
int index2=tmp.indexOf(':');
int min=Integer.parseInt(tmp.substring(0,index2));
int sec=Integer.parseInt(tmp.substring(index2+1,tmp.length()));
String str2=scan.next();
int index3=str.indexOf(':');
int hour2 = Integer.parseInt(str2.substring(0,index3));
String tmp2=str.substring(index3+1,str2.length());
int index4=tmp2.indexOf(':');
int min2=Integer.parseInt(tmp2.substring(0,index4));
int sec2=Integer.parseInt(tmp2.substring(index4+1,tmp2.length()));
// System.out.println(hour+" "+min+" "+sec);
// System.out.println(hour2+" "+min2+" "+sec2);
int cal_h=hour2-hour;
int cal_m=min2-min;
int cal_s=sec2-sec;
if(cal_s<0) {
cal_s+=60;
cal_m-=1;
}
if(cal_m<0) {
cal_m+=60;
cal_h-=1;
}
if(cal_h<0) {
cal_h+=24;
}
System.out.format("%02d:%02d:%02d",cal_h,cal_m,cal_s);
}
}
저번문제에서 split이 안먹혔었기때문에 이번에도 substring으로 했더니 엄청 복잡해졌고 뭔가 잘못됐는지 실패가 떴다.
import java.io.*;
import java.text.SimpleDateFormat;
import java.util.*;
public class Main {
static int n,p,cnt=1;
static String[] arr;
static Scanner scan=new Scanner(System.in);
static StringBuilder sb=new StringBuilder();
public static void main(String[] args) {
String str=scan.next();
String str2=scan.next();
int cal_h=Integer.parseInt(str2.split(":")[0])-Integer.parseInt(str.split(":")[0]);
int cal_m=Integer.parseInt(str2.split(":")[1])-Integer.parseInt(str.split(":")[1]);
int cal_s=Integer.parseInt(str2.split(":")[2])-Integer.parseInt(str.split(":")[2]);
if(str.equals(str2)) {
System.out.print("24:00:00");
System.exit(0);
}
// System.out.println(hour+" "+min+" "+sec);
// System.out.println(hour2+" "+min2+" "+sec2);
if(cal_s<0) {
cal_s+=60;
cal_m-=1;
}
if(cal_m<0) {
cal_m+=60;
cal_h-=1;
}
if(cal_h<0) {
cal_h+=24;
}
System.out.format("%02d:%02d:%02d",cal_h,cal_m,cal_s);
}
}
split을 사용해서 3줄로 줄일수있었고 시간이 같을 때 예외처리를 해주었다.
import java.io.*;
import java.text.SimpleDateFormat;
import java.util.*;
public class Main {
static int n,p,cnt=0;
static String[] arr;
static Scanner scan=new Scanner(System.in);
static StringBuilder sb=new StringBuilder();
public static void main(String[] args) {
n=scan.nextInt();
int arr[]=new int[n];
String str=scan.next();
for(int j=0;j<n;j++) {
arr[j]=str.charAt(j)-'0';
}
for(int i=0;i<n;i++) {
cnt+=arr[i];
}
System.out.println(cnt);
}
}
다시볼필요 x
import java.io.*;
import java.text.SimpleDateFormat;
import java.util.*;
public class Main {
static int n,p,cnt=0;
static String[] arr;
static Scanner scan=new Scanner(System.in);
static StringBuilder sb=new StringBuilder();
public static void main(String[] args) {
while(scan.hasNext()) {
String str=scan.nextLine();
if("END".equals(str)) break;
sb.append(str);
System.out.println(sb.reverse());
sb.delete(0, sb.length());
}
}
}
import java.io.*;
import java.util.*;
public class Main {
static int n,p;
static String str;
static Scanner scan=new Scanner(System.in);
static StringBuilder sb=new StringBuilder();
public static void main(String[] args) {
String arr="";
String find="";
String a="";
arr=scan.nextLine();
find=scan.nextLine();
//숫자 빼내기 a: 숫자 빼낸 교과서 find : 찾는문자
for(int i=0;i<arr.length();i++) {
if('0'<=arr.charAt(i)&&arr.charAt(i)<='9') {
continue;
}
else {
a=a+arr.charAt(i);
}
}
if(a.contains(find)) {
System.out.print(1);
}
else {
System.out.print(0);
}
}
}