diff --git a/Experiment/1853 A - Desorting/1853A.cpp b/Experiment/1853 A - Desorting/1853A.cpp
new file mode 100644
index 0000000..bd653dc
--- /dev/null
+++ b/Experiment/1853 A - Desorting/1853A.cpp	
@@ -0,0 +1,46 @@
+#include<bits/stdc++.h>
+using namespace std;
+using ll = long long;
+
+
+void solve()
+{
+    int n;
+    cin>>n;
+    vector<int>v;
+    for(int i=0; i<n; ++i)
+    {
+        int x;
+        cin>>x;
+        v.push_back(x);
+    }
+    
+    if(!is_sorted(v.begin(),v.end()))
+        cout<<0<<endl;
+    else
+    {
+        int d=INT_MAX;
+        for(int i=1; i<n; ++i)
+        {
+            int r;
+            r=v[i]-v[i-1];
+            if(r<d)
+            {
+                d=r;
+            }
+        }
+        int ans=(d/2)+1;
+        cout<<ans<<endl;
+    }
+}
+
+int main()
+{
+    ios_base::sync_with_stdio(false);
+    cin.tie(nullptr);
+
+    int TC = 1;
+    cin >> TC;
+    cin.ignore();
+    while (TC--) solve();
+}
\ No newline at end of file