06. The Signal and the Noise

#include <iostream>
#include <string>

using namespace std;

int main() {
    string str, num;
    getline(cin, str);

    int maxNumber = -2147483647;

    for (int i = 0; i < str.length(); i++) {
        if (str[i] == ' ') {
            if (num != "" && stoi(num) > maxNumber) {
                maxNumber = stoi(num);
            }
            num = "";
        }
        else if (isdigit(str[i])) {
            num += str[i];
        }
    }

    cout << maxNumber << endl;
    return 0;
}