Pakkaus

#include <iostream>
#include <string>
#include <vector>
#include <stdexcept>

using namespace std;

string input;
string tmp;
vector<unsigned int> nums;
unsigned int m;
unsigned int d;
int j;
string r;

int main(){
	
	cin >> input;
	
	for(unsigned int i = 0; i < input.size(); i++){
		tmp = tmp.assign(input, i, 1);
		try{
			stoul(tmp);
			nums.push_back(i);
		} catch (const invalid_argument& ia){}
	}
	
	for(unsigned int i = 0; i < nums.size(); i++){
		tmp = tmp.assign(input, nums[i], 1);
		m = stoul(tmp);
		d = i;
		j = 1;
		r = "";
		while(nums[d + j] == nums[d] + j){
			tmp = tmp.assign(input, nums[d + j], 1);
			m = 10 * m + stoul(tmp);
			i++; j++;
		}
		
		r = r.assign(input, nums[d] + j, nums[i + 1] - nums[d] - 1 - (i - d));
		
		for(unsigned int k = 0; k < m; k++){
			cout << r;
		}
	}
	
	return 0;
	
}

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 1

Verdict: ACCEPTED

Test 3

Group: 1

Verdict: ACCEPTED

Test 4

Group: 1

Verdict: ACCEPTED

Test 5

Group: 1

Verdict: ACCEPTED

Test 6

Group: 2

Verdict: ACCEPTED

Test 7

Group: 2

Verdict: ACCEPTED

Test 8

Group: 2

Verdict: ACCEPTED

Test 9

Group: 2

Verdict: ACCEPTED

Test 10

Group: 2

Verdict: ACCEPTED

Test 11

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 12

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 13

Group: 3

Verdict: ACCEPTED

Test 14

Group: 3

Verdict: ACCEPTED

Test 15

Group: 3

Verdict: ACCEPTED