結果

問題 No.91 赤、緑、青の石
ユーザー Konton7
提出日時 2020-04-29 07:42:17
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 4 ms / 5,000 ms
コード長 4,610 bytes
コンパイル時間 3,153 ms
コンパイル使用メモリ 203,416 KB
最終ジャッジ日時 2025-01-10 03:17:37
ジャッジサーバーID
（参考情報） 		judge4 / judge4
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 4
other AC * 28
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using VI = vector<int>;
using VL = vector<ll>;
using VS = vector<string>;
using VVI = vector<VI>;
using VVL = vector<VL>;
using PII = std::pair<int, int>;
using PLL = std::pair<ll, ll>;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define repr(i, n) for (int i = (int)(n)-1; i >= 0; i--)
#define rep2(i, s, n) for (int i = (s); i < (int)(n); i++)
#define rep3(i, s, n, d) for (int i = (s); i < (int)(n); i += (d))
#define allpt(v) (v).begin(), (v).end()
#define allpt_c(v) (v).cbegin(), (v).cend()
#define allpt_r(v) (v).rbegin(), (v).rend()
const int mod = 1e9 + 7, mod2 = 998244353, mod3 = 1e9 + 9;
const ll inf = 1e18;
const string wsp = " ";
const string tb = "\t";
const string rt = "\n";
template <typename T>
void show1dvec(const vector<T> &v)
{
    if (v.size() == 0)
        return;
    int n = v.size() - 1;
    rep(i, n) cout << v[i] << wsp;
    cout << v[n] << rt;
    return;
}
template <typename T>
void show2dvec(const vector<vector<T>> &v)
{
    int n = v.size();
    rep(i, n) show1dvec(v[i]);
}
template <typename T, typename S>
void show1dpair(const vector<pair<T, S>> &v)
{
    int n = v.size();
    rep(i, n) cout << v[i].first << wsp << v[i].second << rt;
    return;
}
template <typename T, typename S>
void pairzip(const vector<pair<T, S>> &v, vector<T> &t, vector<T> &s)
{
    int n = v.size();
    rep(i, n)
    {
        t.push_back(v[i].first);
        s.push_back(v[i].second);
    }
    return;
}
template <typename T>
void maxvec(vector<T> &v)
{
    T s = v[0];
    int n = v.size();
    rep(i, n - 1)
    {
        if (s > v[i + 1])
        {
            v[i + 1] = s;
        }
        s = v[i + 1];
    }
}
template <typename T, typename S>
bool myfind(T t, S s)
{
    return find(t.cbegin(), t.cend(), s) != t.cend();
}
bool check(int y, int x, int h, int w)
{
    return 0 <= y && y < h && 0 <= x && x < w;
}
template <typename T>
vector<T> cumsum(const vector<T> &v)
{
    T s = 0;
    vector<T> ret = {0};
    rep(i, v.size())
    {
        s += v[i];
        ret.push_back(s);
    }
    return ret;
}
bool iskadomatsu(int a, int b, int c)
{
    return (a != b && b != c && c != a) && ((a > b && b < c) || (a < b && b > c));
}
VS split(string s, char c)
{
    VS ret;
    string part;
    s += c;
    rep(i, s.length())
    {
        if (s[i] == c)
        {
            ret.emplace_back(part);
            part = "";
        }
        else if (s[i] != c)
        {
            part += s[i];
        }
    }
    return ret;
}
string removezero(string &s)
{
    string ret;
    for (auto z : s)
        if (z != '0')
            ret += z;
    return ret;
}
ll sumdigit(ll x)
{
    ll ans{0};
    while (x > 0)
    {
        ans += x % 10;
        x /= 10;
    }
    return ans;
}
template <typename T, typename S, typename R>
ll pow_mod(T p, S q, R mod)
{
    ll ret = 1, r = p;
    while (q)
    {
        if (q % 2)
            ret *= r, ret %= mod;
        r = (r * r) % mod, q /= 2;
    }
    return ret % mod;
}
ll comb(int a, int b, const VL &frac_list, const VL &frac_inv_list)
{
    ll ret = frac_list[a];
    ret *= frac_inv_list[b];
    ret %= mod;
    ret *= frac_inv_list[a - b];
    ret %= mod;
    return ret;
}
int babblesort(VI &v)
{
    int n = v.size(), counter = 0;
    bool flag = true;
    while (flag)
    {
        flag = false;
        for (int j = n - 1; j > 0; j--)
        {
            if (v[j] < v[j - 1])
            {
                swap(v[j], v[j - 1]);
                counter++;
                flag = true;
            }
        }
    }
    return counter;
}
bool making(int x, VI stones)
{
    bool ret1, ret2;
    ret1 = ret2 = false;
    if (stones[1] >= x)
    {
        stones[0] = (stones[1] - x) / 2 + (stones[2] - x) / 2;
        if (stones[0] >= x)
            ret1 = true;
    }
    else
    {
        stones[2] = stones[2] - 2 * x - 2 * (x - stones[1]);
        if (stones[2] >= x)
            ret2 = true;
    }
    
    return ret1 || ret2;
}
int main()
{
    cin.tie(0);
    ios::sync_with_stdio(false);
#ifdef DEBUG
    cout << "DEBUG MODE" << endl;
    ifstream in("input.txt"); //for debug
    cin.rdbuf(in.rdbuf());    //for debug
#endif
    VI stones(3);
    rep(i, 3) cin >> stones[i];
    int ans, m{*min_element(allpt_c(stones))}, ok, ng, mid;
    ans = m;
    rep(i, 3) stones[i] -= m;
    sort(allpt(stones));
    ok = -1, ng = 1e9;
    while (ng - ok > 1)
    {
        mid = (ok + ng) / 2;
        (making(mid, stones)) ? ok = mid : ng = mid;
    }
    ans += ok;
    cout << ans << rt;
    return 0;
}
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