[백준 1173] 운동

문제

https://www.acmicpc.net/problem/1173

1173번: 운동

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내가 작성한 코드

import java.io.*;
import java.util.StringTokenizer;

public class qor1173 {
    public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));

        StringTokenizer st = new StringTokenizer(br.readLine());
        int N = Integer.parseInt(st.nextToken());
        int m = Integer.parseInt(st.nextToken());
        int M = Integer.parseInt(st.nextToken());
        int T = Integer.parseInt(st.nextToken());
        int R = Integer.parseInt(st.nextToken());

        int time = 0;
        int exercise = 0;
        int X = m;

        while(exercise<N){
            if(m+T>M){
                time = -1;
                break;
            }

            if(X<m){
                X=m;
            }

            if(X==m){
                time++;
                exercise++;
                X += T;
            }
            else if(X == M || X+T>M){
                time++;
                X -= R;
            }
            else{
                time++;
                exercise++;
                X += T;
            }
        }

        bw.write(time+"");
        bw.close();
    }
}