提出 #22808820

---

ソースコード 拡げる

// {{{
#include <bits/stdc++.h>
using namespace std;
using LL = long long;
using vi = vector<int>;
using pii = pair<int, int>;
#define sz(x) (int)((x).size())
#define all(x) (x).begin(), (x).end()
#define clr(a, b) memset(a, b, sizeof(a))
#define debug(x...)
#define debug_arr(x...)
#ifdef LOCAL
#include "prettyprint.hpp"
#endif
// }}}

const int N = 66;
LL c[N][N];
LL a, b, k;

int main()
{
#ifdef LOCAL
    freopen("in", "r", stdin);
    // freopen("out", "w", stdout);
#endif
    ios::sync_with_stdio(false);
    cin.tie(0);

    int lim = 60;
    c[0][0] = 1;
    for (int i = 1; i <= lim; ++i)
    {
        c[i][0] = c[i][i] = 1;
        for (int j = 1; j < i; ++j)
        {
            c[i][j] = c[i - 1][j] + c[i - 1][j - 1];
        }
    }

    while (cin >> a >> b >> k)
    {
        LL left = k;
        string ans = "";

        int ca = a, cb = b;

        for (int i = 1; i <= a + b; i++)
        {
            if (ca == 0)
            {
                ans += "b";
                cb--;
            }
            else if (cb == 0)
            {
                ans += "a";
                ca--;
            }
            else
            {
                LL cnt = c[ca + cb - 1][ca - 1];
                debug(ca, cb, cnt);

                if (cnt >= k)
                {
                    ans += "a";
                    ca--;
                }
                else
                {
                    ans += "b";
                    cb--;
                    k -= cnt;
                }
            }
        }

        cout << ans << endl;
    }

    return 0;
}

提出情報

コンパイルエラー

./Main.cpp: In function ‘int main()’:
./Main.cpp:43:12: warning: unused variable ‘left’ [-Wunused-variable]
   43 |         LL left = k;
      |            ^~~~

ジャッジ結果