Add solutions for Codeforces problems 1985A, 1985B, 1985C, 1985D, and 1985E

Codes/1985 A - Creating Words/1985A.cpp

@@ -0,0 +1,25 @@
+#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()
+{
+    string a,b;
+    cin>>a>>b;
+    swap(a[0],b[0]);
+    cout<<a<<" "<<b<<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/1985 B - Maximum Multiple Sum/1985B.cpp

@@ -0,0 +1,38 @@
+#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;
+    cin>>n;
+    int mx=0,x=-1;
+    for(int i=2; i<=n; ++i)
+    {
+        int sum=0;
+        for(int j=1; j*i<=n; ++j)
+        {
+            sum+=j*i;
+        }
+        if(sum>mx)
+        {
+            mx=sum;
+            x=i;
+        }
+    }
+    cout<<x<<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/1985 C - Good Prefixes/1985C.cpp

@@ -0,0 +1,33 @@
+#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;
+    cin>>n;
+    ll mx=0, ct=0, sum=0;
+    for(ll i=0; i<n; ++i)
+    {
+        ll x;
+        cin>>x;
+        sum+=x;
+        mx=max(x,mx);
+        if(sum-mx==mx) ct++;
+    }
+    cout<<ct<<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/1985 D - Manhattan Circle/1985D.cpp

@@ -0,0 +1,60 @@
+#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;
+    vector<string>v;
+    for(int i=0; i<n; ++i)
+    {
+        string s;
+        cin>>s;
+        v.push_back(s);
+    }
+    int x=0,y=0, mx=0, my=0;
+    for(int i=0; i<n; ++i)
+    {
+        int ct=0;
+        for(int j=0; j<m; ++j)
+        {
+            if(v[i][j]=='#')
+                ct++;
+        }
+        if(ct>mx)
+        {
+            mx=ct;
+            x=i+1;
+        }
+    }
+    for(int j=0; j<m; ++j)
+    {
+        int ct=0;
+        for(int i=0; i<n; ++i)
+        {
+            if(v[i][j]=='#')
+                ct++;
+        }
+        if(ct>my)
+        {
+            my=ct;
+            y=j+1;
+        }
+    }
+    cout<<x<<" "<<y<<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/1985 E - Secret Box/1985E.cpp

@@ -0,0 +1,55 @@
+#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;}
+
+vector<ll> nums(ll n) 
+{
+    vector<ll> v;
+    for (ll i = 2; i * i <= n; ++i) 
+    {
+        while (n % i == 0) 
+        {
+            v.push_back(i);
+            n /= i;
+        }
+    }
+    if (n != 1) 
+        v.push_back(n);
+    return v;
+}
+
+void solve()
+{
+    ll x, y, z, k;
+    cin >> x >> y >> z >> k;
+    ll mx=0;
+    for(ll a=1; a<=x; ++a)
+    {
+        for(ll b=1; b<=y; ++b)
+        {
+            if(k%(a*b)) continue;
+            ll c=k/(a*b);
+            if(c<=z && a*b*c==k)
+            {
+                ll ct=(x-a+1)*(y-b+1)*(z-c+1);
+                mx=max(ct,mx);
+            }
+        }
+    }
+    cout<<mx<<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

@@ -339,6 +339,11 @@ This repository contains my solutions of Codeforces problems. They are in C++ la
 | 327 | 1981 A | Turtle and Piggy Are Playing a Game | [Question](https://codeforces.com/problemset/problem/1981/A) | [Solution](https://github.com/ShazidMashrafi/Codeforces-Solutions/tree/master/Codes/1981%20A%20-%20Turtle%20and%20Piggy%20Are%20Playing%20a%20Game)
 | 328 | 1981 B | Turtle and an Infinite Sequence | [Question](https://codeforces.com/problemset/problem/1981/B) | [Solution](https://github.com/ShazidMashrafi/Codeforces-Solutions/tree/master/Codes/1981%20B%20-%20Turtle%20and%20an%20Infinite%20Sequence)
 | 329 | 1981 C | Turtle and an Incomplete Sequence | [Question](https://codeforces.com/problemset/problem/1981/C) | [Solution](https://github.com/ShazidMashrafi/Codeforces-Solutions/tree/master/Codes/1981%20C%20-%20Turtle%20and%20an%20Incomplete%20Sequence)
+| 330 | 1985 A | Creating Words | [Question](https://codeforces.com/problemset/problem/1985/A) | [Solution](https://github.com/ShazidMashrafi/Codeforces-Solutions/tree/master/Codes/1985%20A%20-%20Creating%20Words)
+| 331 | 1985 B | Maximum Multiple Sum | [Question](https://codeforces.com/problemset/problem/1985/B) | [Solution](https://github.com/ShazidMashrafi/Codeforces-Solutions/tree/master/Codes/1985%20B%20-%20Maximum%20Multiple%20Sum)
+| 332 | 1985 C | Good Prefixes | [Question](https://codeforces.com/problemset/problem/1985/C) | [Solution](https://github.com/ShazidMashrafi/Codeforces-Solutions/tree/master/Codes/1985%20C%20-%20Good%20Prefixes)
+| 333 | 1985 D | Manhattan Circle | [Question](https://codeforces.com/problemset/problem/1985/D) | [Solution](https://github.com/ShazidMashrafi/Codeforces-Solutions/tree/master/Codes/1985%20D%20-%20Manhattan%20Circle)
+| 334 | 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)