Add solutions for Codeforces problems 1996 A, B, C, and D

Codes/1996 A - Legs/1996A.cpp

@@ -0,0 +1,56 @@
+#include <bits/stdc++.h>
+using namespace std;
+#ifdef ONLINE_JUDGE
+#define dbg(...)
+#else
+#include "Assets/debug.h"
+#endif
+#define int long long
+#define ll long long
+#define endl '\n'
+#define ff first
+#define ss second
+#define ins insert
+#define pb push_back
+#define ppb pop_back
+#define sz(x) (int)(x).size()
+#define all(x) x.begin(), x.end()
+#define rep(i, a, b) for (int i = a; i < b; ++i)
+#define rrep(i, a, b) for (int i = a; i >= b; --i)
+#define yn(f) f ? cout << "YES\n" : cout << "NO\n"
+#define FAST (ios_base::sync_with_stdio(false), cin.tie(nullptr));
+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 ans = n / 4;
+    n %= 4;
+    ans += n / 2;
+    cout << ans << endl;
+}
+
+signed main()
+{
+    FAST;
+    int TCS = 1;
+    cin >> TCS;
+    for (int TC = 1; TC <= TCS; ++TC)
+    {
+        // cout<<"Case "<<TC<<": ";
+        solve();
+    }
+}

Codes/1996 B - Scale/1996B.cpp

@@ -0,0 +1,65 @@
+#include <bits/stdc++.h>
+using namespace std;
+#ifdef ONLINE_JUDGE
+#define dbg(...)
+#else
+#include "Assets/debug.h"
+#endif
+#define  int  long long
+#define  ll  long long
+#define  endl  '\n'
+#define  ff  first
+#define  ss  second
+#define  ins  insert
+#define  pb  push_back
+#define  ppb  pop_back
+#define  sz(x)  (int)(x).size()
+#define  all(x)  x.begin(), x.end()
+#define  rep(i,a,b)  for(int i=a; i<b; ++i)
+#define  rrep(i,a,b) for(int i=a; i>=b; --i)
+#define  yn(f)  f? cout<<"YES\n":cout<<"NO\n"
+#define  FAST  (ios_base::sync_with_stdio(false), cin.tie(nullptr));
+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,k;
+    cin>>n>>k;
+    int v[n][n];
+    vector<vector<int>>ans;
+    for(int i=0; i<n; ++i)
+    {
+        for(int j=0; j<n; ++j)  
+        {
+            char c;
+            cin>>c;
+            v[i][j] = c-'0';
+        }
+    }
+    for(int i=0; i<n; i+=k)
+    {
+        vector<int>temp;
+        for(int j=0; j<n; j+=k)
+        {
+            temp.pb(v[i][j]);
+        }
+        ans.pb(temp);
+    }
+    for(auto &i:ans)
+    {
+        for(auto &e:i)  cout<<e;
+        cout<<endl;
+    }
+}
+
+signed main()
+{
+    FAST;
+    int TCS = 1;
+    cin >> TCS;
+    for (int TC = 1; TC <= TCS; ++TC)
+    {
+      // cout<<"Case "<<TC<<": ";
+      solve();
+    }
+}

Codes/1996 C - Sort/1996C.cpp

@@ -0,0 +1,64 @@
+#include <bits/stdc++.h>
+using namespace std;
+#ifdef ONLINE_JUDGE
+#define dbg(...)
+#else
+#include "Assets/debug.h"
+#endif
+#define  int  long long
+#define  ll  long long
+#define  endl  '\n'
+#define  ff  first
+#define  ss  second
+#define  ins  insert
+#define  pb  push_back
+#define  ppb  pop_back
+#define  sz(x)  (int)(x).size()
+#define  all(x)  x.begin(), x.end()
+#define  rep(i,a,b)  for(int i=a; i<b; ++i)
+#define  rrep(i,a,b) for(int i=a; i>=b; --i)
+#define  yn(f)  f? cout<<"YES\n":cout<<"NO\n"
+#define  FAST  (ios_base::sync_with_stdio(false), cin.tie(nullptr));
+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,q;
+    cin>>n>>q;
+    string a,b;
+    cin>>a>>b;
+    vector<int>cnt(26,0);
+    vector<vector<int>>v;
+    v.pb(cnt);
+    for(int i=0; i<n; ++i)
+    {
+        cnt[a[i]-'a']++;
+        cnt[b[i]-'a']--;
+        v.pb(cnt);
+    }
+    dbg(v);
+    while(q--)
+    {
+        int l,r;
+        cin>>l>>r;
+        int op=0;
+        dbg(v[l-1],v[r]);
+        for(int i=0; i<26; ++i)
+        {
+            op += abs(v[l-1][i]-v[r][i]);
+        }
+        cout<<op/2<<endl;
+    }
+}
+
+signed main()
+{
+    FAST;
+    int TCS = 1;
+    cin >> TCS;
+    for (int TC = 1; TC <= TCS; ++TC)
+    {
+      // cout<<"Case "<<TC<<": ";
+      solve();
+    }
+}

Codes/1996 D - Fun/1996D.cpp

@@ -0,0 +1,51 @@
+#include <bits/stdc++.h>
+using namespace std;
+#ifdef ONLINE_JUDGE
+#define dbg(...)
+#else
+#include "Assets/debug.h"
+#endif
+#define  int  long long
+#define  ll  long long
+#define  endl  '\n'
+#define  ff  first
+#define  ss  second
+#define  ins  insert
+#define  pb  push_back
+#define  ppb  pop_back
+#define  sz(x)  (int)(x).size()
+#define  all(x)  x.begin(), x.end()
+#define  rep(i,a,b)  for(int i=a; i<b; ++i)
+#define  rrep(i,a,b) for(int i=a; i>=b; --i)
+#define  yn(f)  f? cout<<"YES\n":cout<<"NO\n"
+#define  FAST  (ios_base::sync_with_stdio(false), cin.tie(nullptr));
+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,x;
+    cin>>n>>x;
+    int ct=0;
+    for(int a=1; a<=x; ++a)
+    {
+        int y=min(x-a, n/a);
+        for(int b=1; b<=y; ++b)
+        {
+            int c=min(x-a-b, (n-a*b)/(a+b));
+            ct += max(0ll,c);
+        }
+    }
+    cout<<ct<<endl;
+}
+
+signed main()
+{
+    FAST;
+    int TCS = 1;
+    cin >> TCS;
+    for (int TC = 1; TC <= TCS; ++TC)
+    {
+      // cout<<"Case "<<TC<<": ";
+      solve();
+    }
+}

Readme.md

@@ -370,6 +370,10 @@ This repository contains my solutions of Codeforces problems. They are in C++ la
 | 358 | 1992 A | Only Pluses | [Question](https://codeforces.com/problemset/problem/1992/A) | [Solution](https://github.com/ShazidMashrafi/Codeforces-Solutions/tree/master/Codes/1992%20A%20-%20Only%20Pluses)
 | 359 | 1992 B | Angry Monk | [Question](https://codeforces.com/problemset/problem/1992/B) | [Solution](https://github.com/ShazidMashrafi/Codeforces-Solutions/tree/master/Codes/1992%20B%20-%20Angry%20Monk)
 | 360 | 1992 C | Gorilla and Permutation | [Question](https://codeforces.com/problemset/problem/1992/C) | [Solution](https://github.com/ShazidMashrafi/Codeforces-Solutions/tree/master/Codes/1992%20C%20-%20Gorilla%20and%20Permutation)
+| 361 | 1996 A | Legs | [Question](https://codeforces.com/problemset/problem/1996/A) | [Solution](https://github.com/ShazidMashrafi/Codeforces-Solutions/tree/master/Codes/1996%20A%20-%20Legs)
+| 362 | 1996 B | Scale | [Question](https://codeforces.com/problemset/problem/1996/B) | [Solution](https://github.com/ShazidMashrafi/Codeforces-Solutions/tree/master/Codes/1996%20B%20-%20Scale)
+| 363 | 1996 C | Sort | [Question](https://codeforces.com/problemset/problem/1996/C) | [Solution](https://github.com/ShazidMashrafi/Codeforces-Solutions/tree/master/Codes/1996%20C%20-%20Sort)
+| 364 | 1996 D | Fun | [Question](https://codeforces.com/problemset/problem/1996/D) | [Solution](https://github.com/ShazidMashrafi/Codeforces-Solutions/tree/master/Codes/1996%20D%20-%20Fun)