#include <iostream>
#include <cmath>
#include <fstream>
#include <algorithm>
#include <string>
using namespace std;
int s = 0;
int n = 0;
int a[1000][1000];
bool isPrime(int num)
{
if (num == 1)
return false;
int sq = sqrt(num);
for (int i = 2; i < sq + 1; i++)
{
if (num % i == 0)
return false;
}
return true;
}
int sum(int i, int j) {
if (isPrime(a[i][j]))
return 0;
if (i == n - 1)
return a[i][j];;
return a[i][j] + max(sum(i + 1, j - 1), sum(i + 1, j + 1));
}
void readData()
{
ifstream in;
in.open("d.txt");
string x;
while (std::getline(in, x))
{
n++;
}
in.close();
in.open("d.txt");
for (int i = 0;i < n;i++)
{
s = 0;
for (int j = 0;j < i + 1;j++)
{
in >> a[i][(n - 1 - i) + s];
s += 2;
}
}
for (int i = 0;i < n;i++)
{
s = 0;
for (int j = 0;j < i + 1;j++)
{
cout << i << "," << (n - 1 - i) + s << " = " << a[i][(n - 1 - i) + s] << " ";
s += 2;
}
cout << endl;
}
}
int main()
{
readData();
cout <<"max sum is = "<< sum(0, n - 1);
return 0;
}
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