文字列結合
(library/string/join.hpp)

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• Last update: 2026-01-07 21:05:45+09:00
• Include: #include "library/string/join.hpp"

文字列結合

できること

• 文字列を結合する

計算量

$O(\vert S \vert)$ (合計長)

使い方

vector<string> v;
string S = join(v, ",");

Verified with

• 文字列結合のテスト (tests/string.join.test.cpp)

Code

#pragma once
string join(const vector<string> &v, const string &sep) {
    string res;
    for (int i = 0; i < (int)v.size(); ++i) {
        if (0 < i) res += sep;
        res += v[i];
    }
    return res;
}

#line 2 "library/string/join.hpp"
string join(const vector<string> &v, const string &sep) {
    string res;
    for (int i = 0; i < (int)v.size(); ++i) {
        if (0 < i) res += sep;
        res += v[i];
    }
    return res;
}

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