Add solutions for Codeforces problems 1986A, 1986B, and 1986C

Codes/1986 A - X Axis/1986A.cpp

@@ -0,0 +1,30 @@
+#include <bits/stdc++.h>
+using namespace std;
+#define ll long long
+#define endl '\n'
+ll pow(ll x,ll y,ll m=1e9+7){ll ans=1;x%=m;while(y){if(y&1)ans=(ans*x)%m;x=(x*x)%m;y>>=1;}return ans;}
+
+void solve()
+{
+    int a,b,c;
+    cin>>a>>b>>c;
+    int mn = INT_MAX;
+    for(int i=1; i<=10; ++i)
+    {
+        int diff = abs(a-i)+abs(b-i)+abs(c-i);
+        mn = min(diff, mn);
+    }
+    cout<<mn<<endl;
+}
+
+signed main()
+{
+    ios_base::sync_with_stdio(false), cin.tie(nullptr);
+    int TCS = 1;
+    cin >> TCS;
+    for (int TC = 1; TC <= TCS; ++TC)
+    {
+        // cout<<"Case "<<TC<<": ";
+        solve();
+    }
+}

Codes/1986 B - Matrix Stabilization/1986B.cpp

@@ -0,0 +1,48 @@
+#include <bits/stdc++.h>
+using namespace std;
+#define ll long long
+#define endl '\n'
+ll pow(ll x,ll y,ll m=1e9+7){ll ans=1;x%=m;while(y){if(y&1)ans=(ans*x)%m;x=(x*x)%m;y>>=1;}return ans;}
+
+
+void solve()
+{
+    ll n,m;
+    cin>>n>>m;
+    vector<vector<ll>> v(n, vector<ll>(m));
+    for(ll i=0; i<n; ++i)
+    {
+        for(ll j=0; j<m; ++j)
+            cin>>v[i][j];
+    }
+    for(int i=0; i<n; ++i)
+    {
+        for(int j=0; j<m; ++j)
+        {
+            ll mx=0;
+            if(i+1<n)  
+                mx=max(mx, v[i+1][j]);
+            if(i-1>=0)   
+                mx=max(mx, v[i-1][j]);
+            if(j+1<m) 
+                mx=max(mx, v[i][j+1]);
+            if(j-1>=0)  
+                mx=max(mx, v[i][j-1]);
+            if(v[i][j]>mx)  v[i][j] = mx;
+            cout<<v[i][j] << " ";
+        }
+        cout<<endl;
+    }
+}
+
+signed main()
+{
+    ios_base::sync_with_stdio(false), cin.tie(nullptr);
+    int TCS = 1;
+    cin >> TCS;
+    for (int TC = 1; TC <= TCS; ++TC)
+    {
+        // cout<<"Case "<<TC<<": ";
+        solve();
+    }
+}

Codes/1986 C - Update Queries/1986C.cpp

@@ -0,0 +1,41 @@
+#include <bits/stdc++.h>
+using namespace std;
+#define ll long long
+#define endl '\n'
+ll pow(ll x,ll y,ll m=1e9+7){ll ans=1;x%=m;while(y){if(y&1)ans=(ans*x)%m;x=(x*x)%m;y>>=1;}return ans;}
+
+void solve()
+{
+    int n,m;
+    cin>>n>>m;
+    string s,c;
+    cin>>s;
+    set<int>st;
+    for(int i=0; i<m; ++i)
+    {
+        int x;
+        cin>>x;
+        st.insert(x);
+    }
+    cin>>c;
+    sort(c.begin(),c.end());
+    vector<int>v;
+    for(auto x:st)  v.push_back(x);
+    for(int i=0; i<st.size(); ++i)
+    {
+        s[v[i]-1] = c[i];
+    }
+    cout<<s<<endl;
+}
+
+signed main()
+{
+    ios_base::sync_with_stdio(false), cin.tie(nullptr);
+    int TCS = 1;
+    cin >> TCS;
+    for (int TC = 1; TC <= TCS; ++TC)
+    {
+        // cout<<"Case "<<TC<<": ";
+        solve();
+    }
+}

Readme.md

@@ -349,6 +349,9 @@ This repository contains my solutions of Codeforces problems. They are in C++ la
 | 337 | 1985 E | Secret Box | [Question](https://codeforces.com/problemset/problem/1985/E) | [Solution](https://github.com/ShazidMashrafi/Codeforces-Solutions/tree/master/Codes/1985%20E%20-%20Secret%20Box)
 | 338 | 1985 F | Final Boss | [Question](https://codeforces.com/problemset/problem/1985/F) | [Solution](https://github.com/ShazidMashrafi/Codeforces-Solutions/tree/master/Codes/1985%20F%20-%20Final%20Boss)
 | 339 | 1985 G | D-Function | [Question](https://codeforces.com/problemset/problem/1985/G) | [Solution](https://github.com/ShazidMashrafi/Codeforces-Solutions/tree/master/Codes/1985%20G%20-%20D-Function)
+| 340 | 1986 A | X Axis | [Question](https://codeforces.com/problemset/problem/1986/A) | [Solution](https://github.com/ShazidMashrafi/Codeforces-Solutions/tree/master/Codes/1986%20A%20-%20X%20Axis)
+| 341 | 1986 B | Matrix Stabilization | [Question](https://codeforces.com/problemset/problem/1986/B) | [Solution](https://github.com/ShazidMashrafi/Codeforces-Solutions/tree/master/Codes/1986%20B%20-%20Matrix%20Stabilization)
+| 342 | 1986 C | Update Queries | [Question](https://codeforces.com/problemset/problem/1986/C) | [Solution](https://github.com/ShazidMashrafi/Codeforces-Solutions/tree/master/Codes/1986%20C%20-%20Update%20Queries)