# UVa 11137 – Ingenuous Cubrency

Problem Link : https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=24&page=show_problem&problem=2078

Github Link : https://github.com/tanmoy13/Uva/tree/master/11137—Ingenuous-Cubrency

## Solution Idea:

This is a classical coin change  problem and this can be solved using dp. Here the coins  value are the cubic value of 1 to 21. we take a array called dp[] which size is greater than the maximum amount of input value. At first dp array contains only 0. Now we set dp[0]=1 because we can make 0 in 1 way and that is 0 😛 .

Now we run a loop via i and j for all index where i control coins value and j controls dp array index and calculate this…

dp[j]+=dp[j-coins[i]]

After this iteration we just take input and print the value of the dp array at that input index.

```
/*
+-+ +-+ +-+
|R| |.| |S|
+-+ +-+ +-+
*/

#include <bits/stdc++.h>

#define pii             pair <int,int>
#define sc              scanf
#define pf              printf
#define Pi              2*acos(0.0)
#define ms(a,b)         memset(a, b, sizeof(a))
#define pb(a)           push_back(a)
#define MP              make_pair
#define db              double
#define ll              long long
#define EPS             10E-10
#define ff              first
#define ss              second
#define sqr(x)          (x)*(x)
#define D(x)            cout<<#x " = "<<(x)<<endl
#define VI              vector <int>
#define DBG             pf("Hi\n")
#define MOD             100007
#define MAX             10000
#define CIN             ios_base::sync_with_stdio(0); cin.tie(0)
#define SZ(a)           (int)a.size()
#define sf(a)           scanf("%d",&a)
#define sfl(a)          scanf("%lld",&a)
#define sff(a,b)        scanf("%d %d",&a,&b)
#define sffl(a,b)       scanf("%lld %lld",&a,&b)
#define sfff(a,b,c)     scanf("%d %d %d",&a,&b,&c)
#define sfffl(a,b,c)    scanf("%lld %lld %lld",&a,&b,&c)
#define loop(i,n)       for(int i=0;i<n;i++)
#define REP(i,a,b)      for(int i=a;i<b;i++)
#define TEST_CASE(t)    for(int z=1;z<=t;z++)
#define PRINT_CASE      printf("Case %d: ",z)
#define all(a)          a.begin(),a.end()
#define intlim          2147483648
#define inf             1000000
#define ull             unsigned long long

using namespace std;

/*----------------------Graph Moves----------------*/
//const int fx[]={+1,-1,+0,+0};
//const int fy[]={+0,+0,+1,-1};
//const int fx[]={+0,+0,+1,-1,-1,+1,-1,+1};   // Kings Move
//const int fy[]={-1,+1,+0,+0,+1,+1,-1,-1};  // Kings Move
//const int fx[]={-2, -2, -1, -1,  1,  1,  2,  2};  // Knights Move
//const int fy[]={-1,  1, -2,  2, -2,  2, -1,  1}; // Knights Move
/*------------------------------------------------*/

//int Set(int N,int pos){return N=N | (1<<pos);}
//int reset(int N,int pos){return N= N & ~(1<<pos);}
//bool check(int N,int pos){return (bool)(N & (1<<pos));}
/*------------------------------------------------*/

ll dp[10100];
int coins[30];

int main()
{
///freopen("in.txt","r",stdin);
///freopen("out.txt","w",stdout);

REP(i,1,22) coins[i]=sqr(i)*i;

dp[0]=1;

for(int i=1;i<22;i++)
{
for(int j=coins[i];j<10100;j++)
if(dp[j-coins[i]])
dp[j]+=dp[j-coins[i]];
}

int n;

while(sf(n)==1)
{
pf("%lld\n",dp[n]);
}

return 0;
}

```
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