greedy algorithms

Author: YooSeonjae

MinimizingLateness/MinimizingLateness.java

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+import java.io.*;
+import java.util.*;
+
+public class MinimizingLateness {
+
+	private static class Schedule { // Schedule class
+		int t = 0; // Time required for the operation to be performed
+		int d = 0; // Time the job should be completed
+		int s = 0; // Start time of the task
+		int f = 0; // End time of the operation
+
+		public Schedule(int t, int d) {
+			this.t = t; 
+			this.d = d; 
+		}
+	}
+
+	public static void main(String[] args) throws IOException {
+		// TODO Auto-generated method stub
+		StringTokenizer token;
+
+		String ch;
+		BufferedReader in = new BufferedReader(new FileReader("input.txt"));
+		int indexCount; // size of array index
+		ch = in.readLine();
+		indexCount = Integer.parseInt(ch); // The first line specifies the size of the operation (= the size of the array)
+		System.out.println("Input Data : ");
+		System.out.println(indexCount); // number of operations
+		Schedule array[] = new Schedule[indexCount]; // Create an array to hold the operation
+		int i = 0;
+		while ((ch = in.readLine()) != null) {
+			token = new StringTokenizer(ch, " "); 
+			// Include the time required for the operation to be performed in the array and the time it should be completed.
+			array[i] = new Schedule(Integer.parseInt(token.nextToken()), Integer.parseInt(token.nextToken()));
+			i++; // 다음 인덱스
+			System.out.println(array[i - 1].t + " " + array[i - 1].d); 
+		}
+
+		int tryTime = 0; // Total time worked
+		int lateness = 0; // Lateness
+		for (int j = 0; j < indexCount - 1; j++) {
+			array[j].s = tryTime; // Start time of the task
+			array[j].f = tryTime + array[j].t; // Time finished
+			tryTime = tryTime + array[j].t; // Add total work time
+			// Lateness
+			lateness = lateness + Math.max(0, tryTime - array[j].d);
+		}
+		System.out.println();
+		System.out.println("Output Data : "); 
+		System.out.println(lateness);
+	}
+}

MinimizingLateness/data06_lateness.txt

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+6
+3 6
+2 8
+1 9
+4 9
+3 14
+2 15