Added one LeetCode question

CodeChef/MINLCS.cpp

@@ -0,0 +1,48 @@
+// https://www.codechef.com/START61C/problems/MINLCS
+#include <bits/stdc++.h>
+using namespace std;
+#define ll long long
+void solve(string s, string s1, int n)
+{
+    map<char, ll> f, fa;
+    for (auto u : s)
+    {
+        f[u]++;
+    }
+    for (auto u : s1)
+    {
+        fa[u]++;
+    }
+    ll mn = 0;
+    for (ll i = 0; i < s.size(); i++)
+    {
+        if (f[s[i]] > 0 && fa[s[i]] > 0)
+        {
+            ll a = min(f[s[i]], fa[s[i]]);
+            mn = max(mn, a);
+        }
+    }
+    if (mn == 0)
+    {
+        cout << 0 << endl;
+    }
+    else
+    {
+        cout << mn << endl;
+    }
+}
+int main()
+{
+    int t;
+    cin >> t;
+    while (t--)
+    {
+        int n;
+        cin >> n;
+        string s, s1;
+        cin >> s >> s1;
+
+        solve(s, s1, n);
+    }
+    return 0;
+}

Codeforces/EvenOddIncrements.cpp

@@ -0,0 +1,67 @@
+// https://codeforces.com/contest/1744/problem/B
+#include <bits/stdc++.h>
+using namespace std;
+#define ll long long
+#define endl "\n"
+void solve()
+{
+    ll n, q;
+    cin >> n >> q;
+    vector<ll> even;
+    vector<ll> odd;
+    ll ans = 0;
+    for (int i = 0; i < n; i++)
+    {
+        ll inp;
+        cin >> inp;
+        if (inp % 2 == 0)
+        {
+            even.push_back(inp);
+        }
+        else
+        {
+            odd.push_back(inp);
+        }
+        ans += inp;
+    }
+    ll e = even.size();
+    ll o = odd.size();
+    for (ll i = 0; i < q; i++)
+    {
+        ll x, y;
+        cin >> x >> y;
+        if (x == 0 and y % 2 == 0)
+        {
+            ans += (y * e);
+        }
+        else if (x == 0 and y % 2 == 1)
+        {
+            ans += (y * e);
+            e = 0;
+            o = n;
+        }
+        else if (x == 1 and y % 2 == 0)
+        {
+            ans += (y * o);
+        }
+        else if (x == 1 and y % 2 == 1)
+        {
+            ans += (y * o);
+            e = n;
+            o = 0;
+        }
+        cout << ans << endl;
+    }
+}
+int main()
+{
+    ios::sync_with_stdio(false);
+    cin.tie(NULL), cout.tie(NULL);
+    ll t;
+    cin >> t;
+    while (t--)
+    {
+        solve();
+    }
+    return 0;
+}

LeetCode/FIND-DUPLICATE.cpp

@@ -0,0 +1,33 @@
+#include <bits/stdc++.h>
+using namespace std;
+#define ll long long
+#define endl "\n"
+// MAIN FUNCTION
+int findDuplicate(vector<int> &nums)
+{
+    int n = nums.size();
+    unordered_map<int, int> m;
+    for (int i = 0; i < n; i++)
+    {
+        m[nums[i]]++;
+    }
+    int ans;
+    for (auto it : m)
+    {
+        if (it.second > 1)
+        {
+            ans = it.first;
+            break;
+        }
+    }
+    return ans;
+}
+int main()
+{
+    ios::sync_with_stdio(false);
+    cin.tie(NULL), cout.tie(NULL);
+    // SAMPLE TESTCASES
+    vector<int> v = {1, 3, 4, 2, 2};
+    cout << findDuplicate(v) << endl;
+    return 0;
+}