Pakkaus

#include <iostream>
#include <string>
#include <sstream>
#include <vector>
#include <utility>

int main() {
    
    std::string sin;
    std::string sout = "";

    std::cin >> sin;

    std::vector<std::pair<std::string, std::string> > v;

    std::string len = "";
    std::string temp = "";
    for(unsigned int i = 0; i < sin.length(); i++) {
        if(sin[i] >= '0' && sin[i] <= '9') {

            if(temp.length() > 0) {
                
                int l;
                std::stringstream ss(len);
                ss >> l;

                v.push_back(std::make_pair(len, temp));
                temp = "";
                len = "";
            }

            len = len + sin[i];
        } else {
            temp = temp + sin[i];    
        }
    }

    int l;
    std::stringstream ss(len);
    ss >> l;

    v.push_back(std::make_pair(len, temp));

    for(auto a : v) {

        std::string tempR = "";
        for(int i = 0; i < std::stoi(a.first); i++) {
            tempR = tempR + a.second;
        }

        sout = sout + tempR;
    }

    std::cout << sout << '\n';



    //bool b = true;
    //int l = 0;
    //int prevI = 0;

    //for(unsigned int i = 0; i < sin.length() - 1; i++) {
    //    if(b) {
    //        if(sin[i] < '0'||sin[i] > '9') {
    //            //sin.insert(i++, 1, ' ');    
    //            std::stringstream ss(sin.substr(prevI, i));
    //            ss >> l;

    //            std::cout << l << "\n";

    //            prevI = i;
    //            b = !b;
    //        }
    //    } else {
    //        if(sin[i] >= '0' && sin[i] <= '9') {
    //            //sin.insert(i++, 1, ' ');    
    //            std::cout << sin.substr(prevI, i) << "\n";
    //            prevI = i;
    //            b = !b;
    //        }
    //    }
    //}
    //std::stringstream ss(sin);

    //int len;
    //while(ss >> len) {
    //    std::string temp;
    //    std::string temp2 = "";
    //    ss >> temp;
    //    
    //    for(int i = 0; i < len; i++)
    //        temp2 = temp2 + temp;

    //    sout = sout + temp2;
    //}

    //std::cout << sout << "\n";
    //std::cout << sout.length() << "\n";
    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: TIME LIMIT EXCEEDED

Test 14

Group: 3

Verdict: ACCEPTED

Test 15

Group: 3

Verdict: ACCEPTED