From e92b082532d18bbb9dc7cd1911561bd6e6becaf6 Mon Sep 17 00:00:00 2001
From: Suvojit Ghosh <suvo.ghosh.965@gmail.com>
Date: Sat, 16 Oct 2021 20:14:11 +0530
Subject: [PATCH 1/3] Adding Solution for 1866

---
 solutions/1866.java | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 solutions/1866.java

diff --git a/solutions/1866.java b/solutions/1866.java
new file mode 100644
index 0000000..de386f8
--- /dev/null
+++ b/solutions/1866.java
@@ -0,0 +1,28 @@
+class Solution {
+    public boolean findRotation(int[][] mat, int[][] target) {
+        for(int i=1;i<=4;i++){
+            if(Arrays.deepEquals(mat,target))
+                return true;
+            mat=rotate(mat);
+        }
+        return false;
+    }
+    static int[][] rotate(int[][] m){
+        int temp,n=m.length;
+        int[][] ans=new int[n][n];
+        for(int i=0;i<n;i++){
+            for(int j=0;j<n;j++){
+                ans[i][j]=m[j][i];
+                ans[j][i]=m[i][j];
+            }
+        }
+        for(int i=0;i<n;i++){
+            for(int j=0;j<n/2;j++){
+                temp=ans[i][j];
+                ans[i][j]=ans[i][n-j-1];
+                ans[i][n-j-1]=temp;
+            }
+        }
+        return ans;
+    }
+}
\ No newline at end of file

From 4a867e670562979b85c6595a30c513214f59a0dd Mon Sep 17 00:00:00 2001
From: Suvojit Ghosh <suvo.ghosh.965@gmail.com>
Date: Sat, 16 Oct 2021 20:26:09 +0530
Subject: [PATCH 2/3] Adding Solution for 1854

---
 solutions/1854.java | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 solutions/1854.java

diff --git a/solutions/1854.java b/solutions/1854.java
new file mode 100644
index 0000000..7f852c7
--- /dev/null
+++ b/solutions/1854.java
@@ -0,0 +1,23 @@
+class Solution {
+    public int maximumPopulation(int[][] logs) {
+        int[] year=new int[2051];int max=0;
+        for(int[] i:logs){
+            year[i[0]]+=1;
+            year[i[1]]-=1;
+            if(i[1]>max)
+                max=i[1];
+        }
+        int[] prefix=new int[max+1];
+        for(int i=1950;i<=max;i++){
+            prefix[i]=prefix[i-1]+year[i];
+        }
+        int my=0,m=0;
+        for(int i=1950;i<=max;i++){
+            if(m<prefix[i]){
+                m=prefix[i];
+                my=i;
+            }
+        }
+        return my;
+    }
+}
\ No newline at end of file

From 4569a36dd1ab0644478e74a6865a402e2d6956c7 Mon Sep 17 00:00:00 2001
From: Suvojit Ghosh <suvo.ghosh.965@gmail.com>
Date: Sat, 16 Oct 2021 20:35:39 +0530
Subject: [PATCH 3/3] Adding solution for 1859

---
 solutions/1859.java | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 solutions/1859.java

diff --git a/solutions/1859.java b/solutions/1859.java
new file mode 100644
index 0000000..271678f
--- /dev/null
+++ b/solutions/1859.java
@@ -0,0 +1,25 @@
+class Solution {
+    public String sortSentence(String s) {
+        String[] word=s.split(" ");
+        int i=0;
+        while(i<word.length){
+            int ind=word[i].charAt(word[i].length()-1)-1-48;
+            if(word[ind].charAt(word[ind].length()-1)!=word[i].charAt(word[i].length()-1)){
+                String temp=word[i];
+                word[i]=word[ind];
+                word[ind]=temp;
+            }
+            else
+                i++;
+        }
+        StringBuilder ans=new StringBuilder();
+        for(i=0;i<word.length;i++){
+            for(int j=0;j<word[i].length()-1;j++){
+                ans.append(word[i].charAt(j));
+            }
+            if(i!=word.length-1)
+                ans.append(' ');
+        }
+        return ans.toString();
+    }
+}
\ No newline at end of file