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Java Solution for LeetCode algorithm problems, continually updating
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package g1201_1300.s1235_maximum_profit_in_job_scheduling;
// #Hard #Array #Dynamic_Programming #Sorting #Binary_Search
// #2022_03_12_Time_27_ms_(89.19%)_Space_73.8_MB_(49.40%)
import java.util.Arrays;
import java.util.Comparator;
public class Solution {
public int jobScheduling(int[] startTime, int[] endTime, int[] profit) {
int n = startTime.length;
int[][] time = new int[n][3];
for (int i = 0; i < n; i++) {
time[i][0] = startTime[i];
time[i][1] = endTime[i];
time[i][2] = profit[i];
}
Arrays.sort(time, Comparator.comparingInt(a -> a[1]));
int[][] maxP = new int[n][2];
int lastPos = -1;
int currProfit;
for (int i = 0; i < n; i++) {
currProfit = time[i][2];
for (int j = lastPos; j >= 0; j--) {
if (maxP[j][1] <= time[i][0]) {
currProfit += maxP[j][0];
break;
}
}
if (lastPos == -1 || currProfit > maxP[lastPos][0]) {
lastPos++;
maxP[lastPos][0] = currProfit;
maxP[lastPos][1] = time[i][1];
}
}
return maxP[lastPos][0];
}
}