Submission #1364446

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Source Code Expand

#include <iostream>
#include <string>


bool has4or9(std::string s) {
    return (s.find("4") != -1 || s.find("9") != -1 ? true : false);
}

int main() {

    int A, B;
    std::cin >> A >> B;

    int c = 0;

    for (int i=A; i<=B; i++) if (has4or9(std::to_string(i))) c++;

    std::cout << c << std::endl;

    return 0;

}

Submission Info

Judge Result