C++ 알고리즘 - 백준 28702 FizzBuzz

https://www.acmicpc.net/problem/28702

 

#include <iostream>
#include <string>
#define endl "\n"

using namespace std;

int main(void) {
	// C++ Init
	ios::sync_with_stdio(false);
	cin.tie(NULL);

	string input1, input2, input3;
	int answer;
	cin >> input1 >> input2 >> input3;

	if (isdigit(input3[0]) > 0) {
		answer = stoi(input3) + 1;

		if (answer % 3 == 0 && answer % 5 == 0) cout << "FizzBuzz";
		else if (answer % 3 == 0) cout << "Fizz";
		else if (answer % 5 == 0) cout << "Buzz";
		else cout << answer;
	}
	
	else if (isdigit(input2[0]) > 0) {
		answer = stoi(input2) + 2;

		if (answer % 3 == 0 && answer % 5 == 0) cout << "FizzBuzz";
		else if (answer % 3 == 0) cout << "Fizz";
		else if (answer % 5 == 0) cout << "Buzz";
		else cout << answer;
	}

	else if (isdigit(input1[0]) > 0) {
		answer = stoi(input1) + 3;

		if (answer % 3 == 0 && answer % 5 == 0) cout << "FizzBuzz";
		else if (answer % 3 == 0) cout << "Fizz";
		else if (answer % 5 == 0) cout << "Buzz";
		else cout << answer;
	}

}