diff --git a/problems/0435.无重叠区间.md b/problems/0435.无重叠区间.md
index 70d0ff3a..f5da71c7 100644
--- a/problems/0435.无重叠区间.md
+++ b/problems/0435.无重叠区间.md
@@ -186,27 +186,27 @@ Java：
 class Solution {
     public int eraseOverlapIntervals(int[][] intervals) {
         if (intervals.length < 2) return 0;
+
         Arrays.sort(intervals, new Comparator<int[]>() {
             @Override
             public int compare(int[] o1, int[] o2) {
-                if (o1[0] != o2[0]) {
+                if (o1[1] != o2[1]) {
                     return Integer.compare(o1[1],o2[1]);
                 } else {
-                    return Integer.compare(o2[0],o1[0]);
+                    return Integer.compare(o1[0],o2[0]);
                 }
             }
         });
 
-        int count = 0;
+        int count = 1;
         int edge = intervals[0][1];
         for (int i = 1; i < intervals.length; i++) {
-            if (intervals[i][0] < edge) {
-                count++;
-            } else {
+            if (edge <= intervals[i][0]){
+                count ++; //non overlap + 1
                 edge = intervals[i][1];
             }
         }
-        return count;
+        return intervals.length - count;
     }
 }
 ```