結果

問題 No.2546 Many Arithmetic Sequences
ユーザー fuppy_kyoprofuppy_kyopro
提出日時 2023-11-24 22:41:10
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
WA  
実行時間 -
コード長 4,618 bytes
コンパイル時間 3,278 ms
コンパイル使用メモリ 232,220 KB
実行使用メモリ 15,424 KB
最終ジャッジ日時 2024-09-26 09:52:15
合計ジャッジ時間 7,815 ms
ジャッジサーバーID
(参考情報)
judge3 / judge5
このコードへのチャレンジ
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 2 ms
5,248 KB
testcase_01 AC 2 ms
5,376 KB
testcase_02 AC 2 ms
5,376 KB
testcase_03 AC 51 ms
8,320 KB
testcase_04 AC 98 ms
9,976 KB
testcase_05 AC 79 ms
9,436 KB
testcase_06 AC 19 ms
5,376 KB
testcase_07 AC 38 ms
6,324 KB
testcase_08 AC 12 ms
5,376 KB
testcase_09 AC 39 ms
6,516 KB
testcase_10 AC 70 ms
8,744 KB
testcase_11 AC 77 ms
9,744 KB
testcase_12 AC 32 ms
6,264 KB
testcase_13 AC 69 ms
9,296 KB
testcase_14 AC 69 ms
9,532 KB
testcase_15 AC 20 ms
5,376 KB
testcase_16 AC 66 ms
9,300 KB
testcase_17 AC 86 ms
12,500 KB
testcase_18 AC 51 ms
7,120 KB
testcase_19 AC 59 ms
9,940 KB
testcase_20 AC 37 ms
6,356 KB
testcase_21 AC 37 ms
8,476 KB
testcase_22 AC 70 ms
9,516 KB
testcase_23 AC 127 ms
15,064 KB
testcase_24 AC 125 ms
15,008 KB
testcase_25 AC 126 ms
14,908 KB
testcase_26 AC 126 ms
14,928 KB
testcase_27 AC 124 ms
14,812 KB
testcase_28 AC 91 ms
14,440 KB
testcase_29 AC 90 ms
14,440 KB
testcase_30 AC 91 ms
14,444 KB
testcase_31 AC 91 ms
14,184 KB
testcase_32 AC 89 ms
14,312 KB
testcase_33 AC 2 ms
5,376 KB
testcase_34 WA -
testcase_35 AC 2 ms
5,376 KB
testcase_36 AC 90 ms
14,060 KB
testcase_37 RE -
testcase_38 AC 2 ms
5,376 KB
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 #

//*
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
//*/

#include <bits/stdc++.h>

// #include <atcoder/all>
// #include <atcoder/lazysegtree>

using namespace std;
// using namespace atcoder;

// #define _GLIBCXX_DEBUG

#define DEBUG(x) cerr << #x << ": " << x << endl;
#define DEBUG_VEC(v)                                        \
    cerr << #v << ":";                                      \
    for (int iiiiiiii = 0; iiiiiiii < v.size(); iiiiiiii++) \
        cerr << " " << v[iiiiiiii];                         \
    cerr << endl;
#define DEBUG_MAT(v)                                \
    cerr << #v << endl;                             \
    for (int iv = 0; iv < v.size(); iv++) {         \
        for (int jv = 0; jv < v[iv].size(); jv++) { \
            cerr << v[iv][jv] << " ";               \
        }                                           \
        cerr << endl;                               \
    }
typedef long long ll;
// #define int ll

#define vi vector<int>
#define vl vector<ll>
#define vii vector<vector<int>>
#define vll vector<vector<ll>>
#define vs vector<string>
#define pii pair<int, int>
#define pis pair<int, string>
#define psi pair<string, int>
#define pll pair<ll, ll>
template <class S, class T>
pair<S, T> operator+(const pair<S, T> &s, const pair<S, T> &t) {
    return pair<S, T>(s.first + t.first, s.second + t.second);
}
template <class S, class T>
pair<S, T> operator-(const pair<S, T> &s, const pair<S, T> &t) { return pair<S, T>(s.first - t.first, s.second - t.second); }
template <class S, class T>
ostream &operator<<(ostream &os, pair<S, T> p) {
    os << "(" << p.first << ", " << p.second << ")";
    return os;
}
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define rep1(i, n) for (int i = 1; i <= (int)(n); i++)
#define rrep(i, n) for (int i = (int)(n)-1; i >= 0; i--)
#define rrep1(i, n) for (int i = (int)(n); i > 0; i--)
#define REP(i, a, b) for (int i = a; i < b; i++)
#define in(x, a, b) (a <= x && x < b)
#define all(c) c.begin(), c.end()
void YES(bool t = true) {
    cout << (t ? "YES" : "NO") << endl;
}
void Yes(bool t = true) { cout << (t ? "Yes" : "No") << endl; }
void yes(bool t = true) { cout << (t ? "yes" : "no") << endl; }
void NO(bool t = true) { cout << (t ? "NO" : "YES") << endl; }
void No(bool t = true) { cout << (t ? "No" : "Yes") << endl; }
void no(bool t = true) { cout << (t ? "no" : "yes") << endl; }
template <class T>
bool chmax(T &a, const T &b) {
    if (a < b) {
        a = b;
        return 1;
    }
    return 0;
}
template <class T>
bool chmin(T &a, const T &b) {
    if (a > b) {
        a = b;
        return 1;
    }
    return 0;
}
#define UNIQUE(v) v.erase(std::unique(v.begin(), v.end()), v.end());
const ll inf = 1000000001;
const ll INF = (ll)1e18 + 1;
const long double pi = 3.1415926535897932384626433832795028841971L;
int popcount(ll t) { return __builtin_popcountll(t); }
// int dx[4] = {1, 0, -1, 0}, dy[4] = {0, 1, 0, -1};
// int dx2[8] = { 1,1,0,-1,-1,-1,0,1 }, dy2[8] = { 0,1,1,1,0,-1,-1,-1 };
vi dx = {0, 0, -1, 1}, dy = {-1, 1, 0, 0};
vi dx2 = {1, 1, 0, -1, -1, -1, 0, 1}, dy2 = {0, 1, 1, 1, 0, -1, -1, -1};
struct Setup_io {
    Setup_io() {
        ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
        cout << fixed << setprecision(25);
    }
} setup_io;
// const ll MOD = 1000000007;
const ll MOD = 998244353;
// #define mp make_pair
// #define endl '\n'

signed main() {
    int n, m;
    cin >> n >> m;

    vector<pll> ad;
    priority_queue<pll> pq;
    rep(i, n) {
        ll a, d;
        cin >> a >> d;
        if (d <= 0) {
            pq.emplace(a, d);
        } else {
            ad.emplace_back(a, d);
        }
    }

    vl neg;
    while (neg.size() < m) {
        auto [a, d] = pq.top();
        pq.pop();
        neg.emplace_back(a);
        pq.emplace(a + d, d);
    }

    vl sum(m + 1);
    rep(i, m) {
        sum[i + 1] = sum[i] + neg[i];
    }
    // DEBUG_VEC(sum);

    ll ans = sum[m];
    rep(i, ad.size()) {
        ll a = ad[i].first, d = ad[i].second;

        auto f = [&](ll x) {
            ll ret = a * x + x * (x - 1) / 2 * d;
            ret += sum[m - x];
            return ret;
        };
        // DEBUG(ad[i]);

        ll l = 0, r = m;
        while (l + 2 < r) {
            ll x1 = (l * 2 + r) / 3, x2 = (l + r * 2) / 3;

            if (f(x1) < f(x2)) {
                l = x1;
            } else {
                r = x2;
            }
        }

        for (ll x = l; x <= r; x++) {
            // DEBUG(pll(x, f(x)));
            chmax(ans, f(x));
        }
    }

    cout << ans << endl;
}
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