Пробелы

#include <iostream>
#include <string>
#include <sstream>
#include <cmath>
#include <algorithm>
#include <memory.h>
#include <stdio.h>
#include <vector>
#include <stack>
#include <deque>
#include <queue>
#include <vector>
#include <set>
#include <iterator>
#include <map>
#include <iomanip>
#define int long long
#define fir first
#define sec second
#define pb push_back
#define all(v) (v).begin(), v.end()
#define double long double
#define endl "\n"
#define un unsigned
#define INF 1000000000
using namespace std;

/*
#pragma GCC optimize ("O3", "unroll-all-loops")
#pragma GCC target ("sse4.2")
#pragma GCC optimize ("O1")
#pragma GCC optimize ("O2")
#pragma GCC optimize ("O3")
#pragma GCC optimize ("Os")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#pragma comment(linker, "/stack:200000000")*/


signed main()
{
    string s;
    getline(cin, s);

    int pr = 0;

    for (int i = 0; i < s.size(); i++)
    {
        if (s[i] == ' ')
        {
            pr++;
        }
    }

    int u = 0;

    for (int i = 1; i < s.size() - 1; i++)
    {
        if (s[i] == ' ' && s[i + 1] != ' ')
        {
            u++;
        }
    }

    u++;

    for (int i = 0; i < s.size() - 1; i++)
    {
        if (s[i] == ' ' && s[i + 1] == ' ')
        {
            s.erase(i, 1);
            i--;
        }
    }

    int lol = pr / (u - 1);
    int kek = 0;

    string ans = "";

    for (int i = 0; i < s.size(); i++)
    {
        if (s[i] != ' ')
        {
            ans += s[i];
        }
        else
        {

            if (kek == u - 1)
            {
                break;
            }

            kek++;

            int flag = 0;

            if (kek >= u - pr % (u - 1))
            {
                lol++;
                flag = 1;
            }

            for (int i = 0; i < lol; i++)
            {
                ans += " ";
            }

            lol = lol - flag;
        }


    }


    cout << ans;

    return 0;
}