#include <cstdlib>
#include <cstdio>
#include <vector>
#include <algorithm>

#define L 1000
#define M 100
#define N 25

void CountTotalCoins(int x, int y, int z)
{
  int sum, c1000, c100, c25, c1; 
  sum = M*x + N*y + z;
  c1000 = sum / L;
  
  sum -= L * c1000;
  c100 = sum / M;

  sum -= M * c100;
  c25 = sum / N;

  sum -= N * c25;
  c1 = sum;

  printf("%d\n",c100+c25+c1);
}

int main(void)
{
  int a,b,c;
  scanf("%d",&a);
  scanf("%d",&b);
  scanf("%d",&c);
  CountTotalCoins(a,b,c);
  return 0;
}