#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#define rep(i,a,b) for(i=a;i<b;i++)

int cha(const void*a,const void*b){
  if(*(int*)a >*(int*)b){
    return 1;
  }else if(*(int*)a <*(int*)b){
    return -1;
  }else{
    return 0;
  }
}
int main(void){
    int d,i,j,kk=0,m,mb,p;
  int mini=1000,k=0,qi=0,qj=0,n;
  int s=0,h=0;
  int a[15][15],b[1010],c[101],w=0;
  int heavy=1e9,dp[2][100010];
 scanf("%d%d%d",&n,&m,&k);
  rep(i,0,1000){
    dp[0][i]=heavy;
    dp[1][i]=heavy;
  }
rep(i,0,n){
  rep(j,0,m){
  scanf("%d",&a[i][j]);
    }
  kk+=a[i][0];
}
  if(kk>k){
    printf("-1\n");
    return 0;
  }
  rep(j,0,m){
    dp[0][a[0][j]]=0;
  }
  rep(i,1,n){
    rep(j,0,m){
      rep(h,0,1000){
        if(h-a[i][j]>=0){
        dp[1][h]=fmin(dp[1][h],dp[0][h-a[i][j]]);
        }
      }
    }
    rep(h,0,1000){
      dp[0][h]=dp[1][h];
      dp[1][h]=heavy;
    }
  }
      
      j=0;
while(dp[0][k-j]==heavy){
        j++;
}
      printf("%d\n",j);
        }