#include<bits/stdc++.h>
using namespace std;

template<class T> int former(const vector<T> &v, T x) { return upper_bound(v.begin(), v.end(), x) - v.begin() - 1; }
template<class T> int latter(const vector<T> &v, T x) { return lower_bound(v.begin(), v.end(), x) - v.begin(); }
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }

#define sum(a)     ( accumulate ((a).begin(), (a).end(), 0ll))
#define mine(a)    (*min_element((a).begin(), (a).end()))
#define maxe(a)    (*max_element((a).begin(), (a).end()))
#define mini(a)    ( min_element((a).begin(), (a).end()) - (a).begin())
#define maxi(a)    ( max_element((a).begin(), (a).end()) - (a).begin())
#define lowb(a, x) ( lower_bound((a).begin(), (a).end(), (x)) - (a).begin())
#define uppb(a, x) ( upper_bound((a).begin(), (a).end(), (x)) - (a).begin())
int power(int x, int y){int temp;if( y == 0)return 1; temp = power(x, y / 2);if (y % 2 == 0) return temp * temp;else return x * temp * temp;}
int log2n( int n){ return (n > 1) ? 1 + log2n(n / 2) : 0;}
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
typedef tuple<int,int,int> T;
#define gcd(a,b) __gcd((a),(b))
#define lcmll(a,b) a*((b)/gcd((a),(b)))
#define lcm(a,b) ((a)*(b))/gcd((a),(b))

ll inf=1e18+42;
const double eps = 1e-8;
#define M_PI 3.14159265358979323846
const int M = 1e9+7;
const int MN = 1e9;

ll dp[31][31];

string solve(ll i, ll j, ll k){
    if(i==0) {string s1(j,'b'); return s1;}
    if(j==0) {string s2(i,'a'); return s2;}

    if(dp[i-1][j] >= k) {cout<<"a"<<' ';cout << i-1 << ' '<<j<<' '<<k<<endl;return "a" + solve(i-1, j, k);}
    else {cout<<"b"<<' ';cout<<i<<' '<<j-1<<' '<<k-dp[i-1][j]<<endl;return "b" + solve(i, j-1, k-dp[i-1][j]);}

}

int main()
{
    ///freopen("input.txt", "r", stdin);
   ///freopen("output.txt", "w", stdout);
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cout << fixed << setprecision(10);

    ll a, b, k; cin >> a >> b >> k;

     for(ll i=0; i<31; ++i) dp[i][0] = 1, dp[0][i] = 1;

     for(ll i=0; i<a; ++i){
        for(ll j=0; j<b; ++j)
            dp[i+1][j+1] = dp[i+1][j] + dp[i][j+1];
     }
     cout << "DP " << endl;
     for(ll i=0; i<a; ++i){
        for(ll j=0; j<b; ++j) cout << dp[i][j] << ' ';
        cout << endl;
     }
     cout << solve(a, b, k) << endl;

    return 0;
}
by

C++ Online Compiler

Write, Run & Share C++ code online using OneCompiler's C++ online compiler for free. It's one of the robust, feature-rich online compilers for C++ language, running on the latest version 17. Getting started with the OneCompiler's C++ compiler is simple and pretty fast. The editor shows sample boilerplate code when you choose language as C++ and start coding!

Read inputs from stdin

OneCompiler's C++ online compiler supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample program which takes name as input and print your name with hello.

#include <iostream>
#include <string>
using namespace std;

int main() 
{
    string name;
    cout << "Enter name:";
    getline (cin, name);
    cout << "Hello " << name;
    return 0;
}

About C++

C++ is a widely used middle-level programming language.

  • Supports different platforms like Windows, various Linux flavours, MacOS etc
  • C++ supports OOPS concepts like Inheritance, Polymorphism, Encapsulation and Abstraction.
  • Case-sensitive
  • C++ is a compiler based language
  • C++ supports structured programming language
  • C++ provides alot of inbuilt functions and also supports dynamic memory allocation.
  • Like C, C++ also allows you to play with memory using Pointers.

Syntax help

Loops

1. If-Else:

When ever you want to perform a set of operations based on a condition If-Else is used.

if(conditional-expression) {
   //code
}
else {
   //code
}

You can also use if-else for nested Ifs and If-Else-If ladder when multiple conditions are to be performed on a single variable.

2. Switch:

Switch is an alternative to If-Else-If ladder.

switch(conditional-expression){    
case value1:    
 // code    
 break;  // optional  
case value2:    
 // code    
 break;  // optional  
......    
    
default:     
 code to be executed when all the above cases are not matched;    
}

3. For:

For loop is used to iterate a set of statements based on a condition.

for(Initialization; Condition; Increment/decrement){  
  //code  
}

4. While:

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

while (condition) {  
// code 
}

5. Do-While:

Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.

do {  
 // code 
} while (condition);

Functions

Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity. Function gets run only when it is called.

How to declare a Function:

return_type function_name(parameters);

How to call a Function:

function_name (parameters)

How to define a Function:

return_type function_name(parameters) {  
 // code
}