結果

問題 No.2648 [Cherry 6th Tune D] 一次元の馬
ユーザー mjtaimjtai
提出日時 2024-02-23 21:32:00
言語 C++17(gcc12)
(gcc 12.3.0 + boost 1.87.0)
結果
AC  
実行時間 149 ms / 2,000 ms
コード長 4,120 bytes
コンパイル時間 3,394 ms
コンパイル使用メモリ 244,340 KB
実行使用メモリ 6,820 KB
最終ジャッジ日時 2024-09-29 05:38:45
合計ジャッジ時間 6,489 ms
ジャッジサーバーID
（参考情報） 		judge3 / judge5
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ファイルパターン 結果
other AC * 36
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 # 

///////////////////////////////////////////////////////////////////////////////

#include <bits/stdc++.h>
#include <unistd.h>
#include <time.h>
#include <sys/time.h>
#include <ext/pb_ds/assoc_container.hpp>

using namespace std;
using namespace __gnu_pbds;

///////////////////////////////////////////////////////////////////////////////

typedef long long ll;
typedef unsigned long long ull;
typedef __int128_t ll128;
typedef tuple<ll, ll> t2;
typedef tuple<ll, ll, ll> t3;
typedef tuple<ll, ll, ll, ll> t4;
typedef tuple<ll, ll, ll, ll, ll> t5;
template <typename T>
using priority_queue_incr = priority_queue<T, vector<T>, greater<T>>;
template <typename T>
using binary_search_tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

#define pb push_back
#define V vector
#define S static
#define SP << " " <<

#define rep(i,n) for(ll i=0LL; i<n; ++i)
#define srep(i,s,n) for(ll i=s; i<n; ++i)
#define rrep(i,n) for(ll i=n-1LL; i>=0LL; --i)
#define rfrep(i,f,n) for(ll i=n-1LL; i>=f; --i)
#define cfor(i,x) for(const auto & (i) : (x))
#define ALL(a) (a).begin(),(a).end()
#define RALL(a) (a).rbegin(),(a).rend()
#define CIN(x) do { \
        assert(!cin.eof()); \
        cin >> x; \
        assert(!cin.fail()); \
} while(0);
#define E18(x) ((x) * 1'000'000'000'000'000'000LL)
#ifdef DEBUG
#include "../../../template/debug.h"
#else // DEBUG
#define debug_print(...)
#define debug_printf(...)
#endif // DEBUG

///////////////////////////////////////////////////////////////////////////////

ll llin()
{
    ll a; CIN(a); return a;
}

V<ll> llina(ll count)
{
    V<ll> v;
    for (ll i = 0LL; i < count; ++i) {
        ll a; CIN(a); v.push_back(a);
    }
    return v;
}

V<V<ll>> llinaa(ll h, ll w)
{
    V<V<ll>> v(h, V<ll>(w));
    rep (hh, h) rep (ww, w) {
        ll a; CIN(a); v[hh][ww] = a;
    }
    return v;
}

V<t2> llinl2(ll count)
{
    V<t2> v;
    for (ll i = 0LL; i < count; ++i) {
        ll a, b; CIN(a >> b); v.push_back(t2(a, b));
    }
    return v;
}

V<t3> llinl3(ll count)
{
    V<t3> v;
    for (ll i = 0LL; i < count; ++i) {
        ll a, b, c; CIN(a >> b >> c); v.push_back(t3(a, b, c));
    }
    return v;
}

V<t4> llinl4(ll count)
{
    V<t4> v;
    for (ll i = 0LL; i < count; ++i) {
        ll a, b, c, d; CIN(a >> b >> c >> d); v.push_back(t4(a, b, c, d));
    }
    return v;
}

string strin()
{
    string s; CIN(s); return s;
}

V<string> strina(ll count)
{
    V<string> slist(count);
    for (ll i = 0; i < count; ++i) CIN(slist[i]);
    return slist;
}

template <typename T>
void sort(V<T> &v)
{
    sort(v.begin(), v.end());
}

template <typename T>
void sort_reverse(V<T> &v)
{
    sort(v.begin(), v.end(), greater<T>());
}

t2 _ext_gcd(ll a, ll b, ll g)
{
    if (!b) return t2(1, 0);
    ll q = a / b;
    ll r = a % b;
    auto [sx, sy] = _ext_gcd(b, r, g);
    ll x = sy;
    ll y = sx - q * sy;
    return t2(x, y);
}

t2 ext_gcd(ll a, ll b)
{
    return _ext_gcd(a, b, gcd(a, b));
}

// x and mod must be coprime
ll mod_inv(ll x, ll mod)
{
    auto [ret, xxxx] = ext_gcd(x, mod);
    while (ret < 0) ret += mod;
    ret %= mod;
    return ret;
}

///////////////////////////////////////////////////////////////////////////////

void _main();
int main()
{
    cout << setprecision(12);
#ifndef DEBUG
    ios::sync_with_stdio(false);
    cin.tie(0);
#endif // DEBUG

    _main();
    return 0;
}

///////////////////////////////////////////////////////////////////////////////

void slv()
{
    ll n = llin();
    V<ll> alist = llina(n);

    ll low = 0;
    ll high = 1'000'000'000'000LL;
    ll ans = high;

    while (low <= high) {
        ll now = (low + high) / 2LL;
        V<ll> blist = alist;
        rep (i, n) blist[i] += (i+1LL) * now;
        bool ok = true;
        rep (i, n-1) if (blist[i] >= blist[i+1]) ok = false;
        if (ok) {
            ans = now;
            high = now - 1LL;
        }
        else {
            low = now + 1LL;
        }
    }

    cout << ans << "\n";
}

void _main()
{
    ll t = llin();
    rep (i ,t) slv();
}

///////////////////////////////////////////////////////////////////////////////
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