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NumberTheoryandCombinatorics/ProjectEuler/SummationOfPrimes/SumPrimes.cpp
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// // Created by ronal on 2/12/2023. // Problem description link. // https://www.hackerrank.com/contests/projecteuler/challenges/euler010/problem #include <bits/stdc++.h> #define N 1000000 using namespace std; bool isPrime(unsigned long long n){ if(n == 2 || n == 3){ return true; }else if(n <= 1 || n % 2 == 0 || n % 3 == 0){ return false; }else{ for(int i = 5; i * i <= n; i += 6){ if(n % i == 0 || n % (i + 2) == 0){ return false; } } } return true; } void PrimesNumbers(vector<unsigned long long> &primes, unsigned long long size){ unsigned long long sum = 0; for(unsigned long long i = 0; i < primes.size(); i++){ if( primes[i] <= size){ sum += primes[i]; }else{ break;; } } cout << sum << " "; } int main(){ ios_base::sync_with_stdio(false); cin.tie(NULL); vector<unsigned long long> primes; unsigned long long t, n; for(unsigned long long i = 0; i <= N; i++){ if(isPrime(i)){ primes.push_back(i); } } cin >> t; for(unsigned long long a0 = 0; a0 < t; a0++){ cin >> n; PrimesNumbers(primes, n); } return 0; } |