diff --git a/src/main/java/contest/y2022/m1/week/Solution274.java b/src/main/java/contest/y2022/m1/week/Solution274.java
new file mode 100644
index 0000000..f732f0b
--- /dev/null
+++ b/src/main/java/contest/y2022/m1/week/Solution274.java
@@ -0,0 +1,91 @@
+package contest.y2022.m1.week;
+
+
+import java.util.Arrays;
+import java.util.LinkedList;
+import java.util.Queue;
+
+/**
+ * @description:
+ * @author: Administrator
+ * @date: 2021/8/22-10:29
+ */
+public class Solution274 {
+    public static void main(String[] args) {
+        Solution274 solution = new Solution274();
+        System.out.println(solution.maximumInvitations(new int[]{1,0,0,2,1,4,7,8,9,6,7,10,8}));
+    }
+
+    public boolean checkString(String s) {
+        return s.indexOf('b') < 0 || (s.indexOf('b') > s.lastIndexOf('a'));
+    }
+
+    public int numberOfBeams(String[] bank) {
+        int[] nums = new int[bank.length];
+        for (int i = 0; i < bank.length; i++) {
+            for (int j = 0; j < bank[i].length(); j++) {
+                if (bank[i].charAt(j) == '1') {
+                    nums[i]++;
+                }
+            }
+        }
+        int sum = 0;
+        int bef = -1;
+        for (int num : nums) {
+            if (num > 0) {
+                if (bef >= 0) {
+                    sum += bef * num;
+                }
+                bef = num;
+            }
+        }
+        return sum;
+    }
+
+    public boolean asteroidsDestroyed(int mass, int[] asteroids) {
+        Arrays.sort(asteroids);
+        long temp = mass;
+        for (int asteroid : asteroids) {
+            if (temp < asteroid) {
+                return false;
+            }
+            temp += asteroid;
+        }
+        return true;
+    }
+
+    public int maximumInvitations(int[] favorite) {
+        int count = 0;
+        boolean[] uuse = new boolean[favorite.length];
+        for (int i = 0; i < favorite.length; i++) {
+            if (uuse[i]) {
+                continue;
+            }
+            boolean[] use = new boolean[favorite.length];
+            use[i] = true;
+            int start = i;
+            int index = i;
+            int temp = 2;
+            while (favorite[index] != i) {
+                if (favorite[favorite[index]] == index || favorite[favorite[index]] == start) {
+                    use[favorite[index]] = true;
+                    for (int j = 0; j < favorite.length; j++) {
+                        if (use[j]) {
+                            uuse[j] = true;
+                        }
+                    }
+                    break;
+                }
+                if (use[favorite[index]]) {
+                    temp = 0;
+                    break;
+                }
+                temp++;
+                index = favorite[index];
+                use[index] = true;
+            }
+            count = Math.max(count, temp);
+        }
+        return count;
+    }
+}