Problem:
Score : 300 points

Problem

Takahashi, who is a novice in competitive programming, wants to learn M algorithms.
Initially, his understanding level of each of the M algorithms is 0.

Takahashi is visiting a bookstore, where he finds N books on algorithms.
The i-th book (1\leq i\leq N) is sold for C_i yen (the currency of Japan). If he buys and reads it, his understanding level of the j-th algorithm will increase by A_{i,j} for each j (1\leq j\leq M).
There is no other way to increase the understanding levels of the algorithms.

Takahashi's objective is to make his understanding levels of all the M algorithms X or higher. Determine whether this objective is achievable. If it is achievable, find the minimum amount of money needed to achieve it.

Constraints

All values in input are integers.

1\leq N, M\leq 12

1\leq X\leq 10^5

1\leq C_i \leq 10^5

0\leq A_{i, j} \leq 10^5

Input

Input is given from Standard Input in the following format:

N M X
C_1 A_{1,1} A_{1,2} \cdots A_{1,M}
C_2 A_{2,1} A_{2,2} \cdots A_{2,M}
\vdots
C_N A_{N,1} A_{N,2} \cdots A_{N,M}

Output

If the objective is not achievable, print -1; otherwise, print the minimum amount of money needed to achieve it.

Sample Input 1

3 3 10
60 2 2 4
70 8 7 9
50 2 3 9

Sample Output 1

120

Buying the second and third books makes his understanding levels of all the algorithms 10 or higher, at the minimum cost possible.

Sample Input 2

3 3 10
100 3 1 4
100 1 5 9
100 2 6 5

Sample Output 2

-1

Buying all the books is still not enough to make his understanding levels of all the algorithms 10 or higher.

Sample Input 3

8 5 22
100 3 7 5 3 1
164 4 5 2 7 8
334 7 2 7 2 9
234 4 7 2 8 2
541 5 4 3 3 6
235 4 8 6 9 7
394 3 6 1 6 2
872 8 4 3 7 2

Sample Output 3

1067

Solution in C++ (GCC 9.2.1) (judge verdict: Accepted)

#include<bits/stdc++.h>
using namespace std;
#define boost ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define mp make_pair
#define pb push_back
#define fp first
#define sp second
typedef long long int ll;
typedef pair<ll,ll> pp;
#define check(x, i) ((x>>i)&1)
#define set(x,i) (x|(1<<i))
#define unset(x,i) (x&~(1<<i))
#define INF LONG_MAX
#define MAX_N 20
#define MAX 4000005
#define mod 1000000007
#define REP(i,n) for(i=0;i<n;i++)
#define FOR(i,a,b) for(i=a;i<=b;i++)
#define RFOR(i,a,b) for(i=a;i>=b;i--)
#define len(i,s) for(i=0;s[i];i++)
#define T() while(t--)
ll gcd (ll a, ll b){return (a?gcd(b%a,a):b);}
ll pow1(ll a,ll b,ll MOD){ll ans=1;while(b!=0){if(b&1)ans=(ans*a)%MOD;a=(a*a)%MOD;b=b/2;}return ans;}
ll modInverse(ll a,ll p){return pow1(a,p-2,p);}

int main()
{
	boost
	#ifndef ONLINE_JUDGE
    freopen("input.txt", "r", stdin);    
    freopen("output.txt", "w", stdout);
#endif
 ll n,m,x,i,j;
 cin>>n>>m>>x;
vector<ll> v[n];
REP(i,n)
{
	REP(j,m+1)
	{
		ll x;
		cin>>x;
	v[i].pb(x);
}
}

ll cost=INF;
for(i=1;i<(1<<n);i++)
{
	ll b[m];
	for(j=0;j<m;j++)
		b[j]=0;
	ll c=0;
for(j=0;j<n;j++)
{
	if(i&(1<<j))
	{
    for(ll k=1;k<m+1;k++)
      b[k-1]+=v[j][k];
  c=c+v[j][0];
	}
}
int f=0;
for(j=0;j<m;j++)
{
	if(b[j]<x)
     f=1;
}
if(f==0&&c<cost)
	cost=c;
}
if(cost==INF)
cout<<"-1";
else
cout<<cost;

}