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caputdraconis

๋„คํŠธ์›Œํฌ ๊ด€์ ์—์„œ์˜ ํด๋ผ์šฐ๋“œ ์ปดํ“จํŒ…์„ ๊ณต๋ถ€ํ•˜๋Š” ์ค‘์ž…๋‹ˆ๋‹ค :)

[C++] pair vector๋ฅผ sort! ๋“ค์–ด์˜จ ์ˆœ์„œ๋„ ๊ธฐ์ค€์œผ๋กœ ๋‘˜ ์ˆ˜ ์žˆ๋‹ค๊ฑฐ!

  • 2021.08.06 14:49
  • ๐Ÿฅš๊ณ ๋ฆฌ์ฆ˜
๊ธ€ ์ž‘์„ฑ์ž: caputdraconis
๋ฐ˜์‘ํ˜•

/* BOJ 10814์™€ ๊ด€๋ จ๋œ ๊ธ€์ž…๋‹ˆ๋‹ค */

 

 

์ด ๋ฌธ์ œ๋ฅผ pair์™€ vector์˜ ์กฐํ•ฉ์œผ๋กœ ํ’€์–ด๋ณด๋ ค๊ณ  ํ•˜๋Š”๋ฐ!! ๊ฑธ๋ฆฌ๋Š”๊ฒŒ ์žˆ๋‹ค.

๊ทธ๋ƒฅ ์ž…๋ ฅ๊ฐ’์œผ๋กœ ์ฃผ์–ด์ง„ ๋‚˜์ด์™€ ์ด๋ฆ„์„ ๊ธฐ์ค€์œผ๋กœ ์ •๋ ฌํ•˜๋ฉด ์‰ฌ์šด๋ฐ!

 

์ด ๋ฌธ๊ตฌ๊ฐ€ ๊ฑธ๋ฆฐ๋‹ค..

 

 

์ด๋•Œ ์‚ฌ์šฉํ•  ์ˆ˜ ์žˆ๋Š”๊ฒŒ stable_sort๋‹ค! ์‚ฌ์šฉ๋ฒ•์€ sort์™€ ์™„์ „ ๋˜‘๊ฐ™์€๋ฐ ์ด stable_sort๋Š” ๊ธฐ์ค€์ด ๋˜๋Š” ๋น„๊ต๊ฐ’์ด ์ผ์น˜ํ•  ๋•Œ ๊ธฐ์กด์˜ ์ˆœ์„œ๋ฅผ ๋ณด์กดํ•œ๋‹ค.

https://en.cppreference.com/w/cpp/algorithm/stable_sort

 

 

๊ทธ๋ ‡๊ธฐ์— ์ด stable_sort ํ•จ์ˆ˜๋Š” ๊ธฐ์ค€์„ ๋งˆ์Œ๋Œ€๋กœ ์„ค์ •ํ•  ์ˆ˜๋„ ์žˆ์œผ๋ฉฐ!? ์ž…๋ ฅ๋œ ์ˆœ์„œ๋„ ๋ณด์กดํ•  ์ˆ˜ ์žˆ๋Š” ์˜ด์ด๋‚œ ์นœ๊ตฌ๋‹ค~

 

์ด stable_sort ํ•จ์ˆ˜๋ฅผ ์‚ฌ์šฉํ•œ BOJ 10814 ํ’€์ด๋Š” ์•„๋ž˜์™€ ๊ฐ™๋‹ค.

// BOJ 10814 With stable_sort

#include <bits/stdc++.h>
using namespace std;

bool cmp(pair<int, string> u, pair<int, string> v)
{
    return u.first < v.first;
}

int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);

    int T;
    cin >> T;
    vector<pair<int, string> > vec(T);

    for (int i = 0; i < T; i++)
    {
        cin >> vec[i].first >> vec[i].second;
    }

    stable_sort(vec.begin(), vec.end(), cmp);

    for (int i = 0; i < T; i++)
    {
        cout << vec[i].first << " " << vec[i].second << "\n";
    }
}
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