#include <iostream>
#include <vector>
#include <cmath>
 
bool isPrime(int n) {
 
//if number less than 2 return false.
if (n < 2) return false;
 
//if number the number is 2, return true.
if (n == 2) return true;
 
//if the number is divisible by 2 return false.
if (n % 2 == 0) return false;
 
//calculating the square root of the number.
int sqrt_n = sqrt(n);
 
for (int i = 3; i <= sqrt_n; i += 2) {
if (n % i == 0) return false;
}
 
return true;
}
 
int main() {
std::vector<int> primes;
 
// variable to store sum of prime numbers.
int sum = 0;
 
// last variable to iterate and check for the prime number.
int limit = 10000000;
 
for (int i = 5; i <= limit; i += 2) {
if (isPrime(i) && i % 10 != 3) {
primes.push_back(i);
sum += i;
}
}
std::cout << "Sum of primes from 5 to 10 million (excluding those ending with 3): " << sum << std::endl;
std::cout << "Number of primes: " << primes.size() << std::endl;
return 0;
}

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