Add files via upload

Author: Pankajcoder1

best_approach/Calculating_ncr.cpp

@@ -0,0 +1,135 @@
+/*
+    written by Pankaj Kumar.
+    country:-INDIA
+*/
+#include <bits/stdc++.h>
+#include <ext/pb_ds/assoc_container.hpp>
+#include <ext/pb_ds/tree_policy.hpp>
+using namespace std;
+using namespace __gnu_pbds;
+typedef long long ll ;
+typedef vector<ll> vl;
+#define speed cin.tie(0);cout.tie(0);ios_base::sync_with_stdio(0);
+/*  Abbrevations  */
+#define ff first
+#define ss second
+#define mp make_pair
+#define line cout<<endl;
+#define pb push_back
+#define Endl "\n"
+// loops
+#define forin(arr,n) for(ll i=0;i<n;i++) cin>>arr[i];
+// Some print
+#define no cout<<"NO"<<endl;
+#define yes cout<<"YES"<<endl;
+// sort
+#define all(V) (V).begin(),(V).end()
+#define srt(V) sort(all(V))
+#define srtGreat(V) sort(all(V),greater<ll>())
+// some extra
+#define printv(v) for(ll i=0;i<ll(v.size());i++){cout<<v[i]<<" ";} line;
+#define precision(x) cout<<fixed<<setprecision(x);
+#define sz(V) ll(V.size())
+// template
+template <typename T>
+T mymax(T x,T y)
+{
+    return (x>y)?x:y;
+}
+// function
+void kickstart()
+{
+    ll test;
+    cin>>test;
+    for(ll i=1;i<=test;i++)
+    {
+        cout<<"Case #"<<i<<": ";
+    }
+}
+ll power(ll x,ll y,ll mod)
+{
+    ll res=1;
+    // x=x%mod;
+    while(y>0)
+    {
+        if(y%2==1)
+        {
+            res*=x;
+            // res=res%mod;
+        }
+        y/=2; x*=x; // x=x%mod;
+    }
+    return res;
+}
+ll str_to_num(string s)
+{
+    return stoi(s);
+}
+
+string num_to_str(ll num)
+{
+    return to_string(num);
+}
+// datatype definination
+#define ordered_set tree<ll,null_type,less<ll>,rb_tree_tag,tree_order_statistics_node_update>
+class Point
+{
+    public:
+        ll x;
+        ll y;
+        ll z;
+        ll getsum()
+        {
+            return x+y+z;
+        }
+};
+/* ascii value 
+A=65,Z=90,a=97,z=122
+*/
+/*  --------------------MAIN PROGRAM----------------------------*/
+// to run ctrl+b
+
+ll solve()
+{
+    vector< vector<ll> > binom(60, vector<ll>(64));
+    binom[0][0] = 1;
+    for (int i = 1; i < 60; ++i)
+    {
+        binom[i][0] = 1;
+        for (int j = 1; j < 60; ++j)
+        {
+            binom[i][j] = binom[i - 1][j - 1] + binom[i - 1][j];
+        }
+    }
+    for (int i = 1; i < 60; ++i)
+    {
+        for (int j = 1; j < 60; ++j)
+        {
+            cout<<"ncr of "<<i<<" and "<<j<<" is "<<binom[i][j]<<endl;
+        }
+    }
+    return 0;
+}
+
+int main()
+{
+    speed;
+    /* #ifndef ONLINE_JUDGE
+        freopen("input.txt","r",stdin);
+        freopen("output.txt","w",stdout);
+    #endif */
+    ll TestCase=1;
+    cin>>TestCase;
+    while(TestCase--)
+    {
+        solve();
+    }
+}
+/* -----------------END OF PROGRAM --------------------*/
+/*
+* stuff you should look before submission 
+* constraint and time limit
+* int overflow
+* special test case (n=0||n=1||n=2)
+* don't get stuck on one approach if you get wrong answer
+*/