五、完善程序-1

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#include <cctype>
#include <iostream>
#include <string>
using namespace std;

int main() {
	string z;
	cin >> z;
	string s = "";
	
	for (int i = 0; i < z.length(); ) {
		char ch = z[i];
		
		if (① && isdigit(z[i + 1])) {
			i++;
			int count = 0;
			while (i < z.length() && isdigit(z[i])) {
				count = ②;
				i++;
			}
			for (int j = 0; j < ③; ++j) {
				s += ch;
			}
		} else {
			s += ④;
			⑤;
		}
	}
	
	cout << s << endl;
	return 0;
}