Monistus

input/code.cpp: In function 'std::string ExpandWord(std::string)':
input/code.cpp:24:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |     for (int i = 0; i < word.length(); ++i) {
      |                     ~~^~~~~~~~~~~~~~~

#include <iostream>
#include <string>
#include <iostream>
#include <ctype.h>
using namespace std;

string ExpandWord(string originalWord);

int main()
{
    string word;
    word.reserve(500000);
    getline(cin, word);

    string ans = ExpandWord(word);

    cout << ans << endl;
}

string ExpandWord(string originalWord)
{
    string word = originalWord;

    for (int i = 0; i < word.length(); ++i) {
        if (!isdigit(word[i])) {
            continue;
        }
        
        char dulicateLenghtChar = word[i];
        int dulicateLenght = stoi(string(1, dulicateLenghtChar));
        
        word.erase(i, 1);
        string duplicateWord = word.substr(i, dulicateLenght);
        word.insert(i, duplicateWord);


        i -= 1;
    }

    return word;
}

Test 1

Group: 1, 2

Verdict: ACCEPTED

Test 2

Group: 1, 2

Verdict: ACCEPTED

Test 3

Group: 1, 2

Verdict: ACCEPTED

Test 4

Group: 1, 2

Verdict: ACCEPTED

Test 5

Group: 1, 2

Verdict: ACCEPTED

Test 6

Group: 1, 2

Verdict: ACCEPTED

Test 7

Group: 1, 2

Verdict: ACCEPTED

Test 8

Group: 2

Verdict: ACCEPTED

Test 9

Group: 2

Verdict: ACCEPTED

Test 10

Group: 2

Verdict: ACCEPTED

Test 11

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 12

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 13

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 14

Group: 2

Verdict: TIME LIMIT EXCEEDED