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c_cpp
a year ago
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#include <iostream> using namespace std; bool prime(int a) { for (int i = 2; i <= sqrt(a); i++) { if (a % i == 0) return false; } return true; } int sym(int a, int b, int sum = 0) { for (; a <= b; a++) { if (prime(a) == true) sum += a; } return sum; } int main() { int a, b, sum = 0; cin >> a >> b; a = a + 1; cout << sym(a, b, sum); }
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