Submission #1051825

#	Time	Username	Problem	Language	Result	Execution time	Memory
1051825		Mher777	Semiexpress (JOI17_semiexpress)	C++17	100 / 100	36 ms	540 KiB

semiexpress

#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <iomanip>
#include <array>
#include <string>
#include <algorithm>
#include <cmath>
#include <set>
#include <map>
#include <unordered_set>
#include <unordered_map>
#include <vector>
#include <stack>
#include <queue>
#include <deque>
#include <bitset>
#include <list>
#include <iterator>
#include <numeric>
#include <complex>
#include <utility>
#include <random>
#include <cassert>
#include <fstream>
using namespace std;
mt19937_64 rnd(7069);

/* -------------------- Typedefs -------------------- */

typedef int itn;
typedef long long ll;
typedef unsigned long long ull;
typedef double db;
typedef float fl;
typedef long double ld;

/* -------------------- Usings -------------------- */

using vi = vector<int>;
using vll = vector<ll>;
using mii = map<int, int>;
using mll = map<ll, ll>;
using pii = pair<int, int>;
using pll = pair<ll, ll>;

/* -------------------- Defines -------------------- */

#define ff first
#define ss second
#define pub push_back
#define pob pop_back
#define puf push_front
#define pof pop_front
#define mpr make_pair
#define yes cout<<"YES\n"
#define no cout<<"NO\n"
#define all(x) (x).begin(), (x).end()
#define USACO freopen("feast.in", "r", stdin); freopen("feast.out", "w", stdout);

/* -------------------- Constants -------------------- */

const int dx[8] = { -1, 0, 1, 0, -1, -1, 1, 1 };
const int dy[8] = { 0, -1, 0, 1, -1, 1, -1, 1 };
const int MAX = int(1e9 + 5);
const ll MAXL = ll(1e18) + 5ll;
const ll MOD = ll(1000000007);
const ll MOD2 = ll(998244353);

/* -------------------- Functions -------------------- */

void fastio() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
}

void precision(int x) {
    cout.setf(ios::fixed | ios::showpoint);
    cout.precision(x);
}

ll gcd(ll a, ll b) {
    if (a == 0 || b == 0) return(max(a, b));
    while (b) {
        a %= b;
        swap(a, b);
    }
    return a;
}

ll lcm(ll a, ll b) {
    return a / gcd(a, b) * b;
}

ll range_sum(ll a, ll b) {
    if (a > b) return 0ll;
    ll dif = a - 1, cnt = b - a + 1;
    ll ans = ((b - a + 1) * (b - a + 2)) / 2;
    ans += ((b - a + 1) * dif);
    return ans;
}

string dec_to_bin(ll a) {
    string s = "";
    for (ll i = a; i > 0; ) {
        ll k = i % 2;
        i /= 2;
        char c = k + 48;
        s += c;
    }
    if (a == 0) {
        s = "0";
    }
    reverse(all(s));
    return s;
}

ll bin_to_dec(string s) {
    ll num = 0;
    for (int i = 0; i < s.size(); i++) {
        num *= 2ll;
        num += (s[i] - '0');
    }
    return num;
}

ll factorial_by_mod(ll n, ll mod) {
    ll ans = 1;
    ll num;
    for (ll i = 1; i <= n; ++i) {
        num = i % mod;
        ans *= num;
        ans %= mod;
    }
    return ans;
}

bool isPrime(ll a) {
    if (a == 1) return false;
    for (ll i = 2; i * i <= a; i++) {
        if (a % i == 0) return false;
    }
    return true;
}

ll binpow(ll a, ll b) {
    if (!a) return 0;
    ll ans = 1;
    while (b) {
        if (b & 1) {
            ans *= a;
        }
        b >>= 1;
        a *= a;
    }
    return ans;
}

ll binpow_by_mod(ll a, ll b, ll mod) {
    if (!a) return 0;
    ll ans = 1;
    while (b) {
        if (b & 1) {
            ans *= a;
            ans %= mod;
        }
        b >>= 1;
        a *= a;
        a %= mod;
    }
    return ans;
}

/* -------------------- Solution -------------------- */

void slv() {
    ll n, m, k, t, a, b, c;
    cin >> n >> m >> k >> a >> b >> c >> t;
    vector<pll> x;
    for (int i = 0; i < m; ++i) {
        ll num;
        cin >> num;
        x.pub({ num,0 });
        x[i].ss = min(c, b) * (x[i].ff - 1ll);
    }
    if ((c >= b && b >= a) || (b >= c && c >= a)) {
        cout << t / a;
        return;
    }
    if (c >= a && a >= b) {
        ll cur, ans = 0;
        for (int i = 0; i < m - 1; ++i) {
            cur = b * (x[i].ff - 1ll);
            if (cur > t) break;
            ll x1 = min(x[i + 1].ff - 1, x[i].ff + (t - cur) / a);
            ans += x1 - x[i].ff + 1ll;
        }
        if (x.back().ss <= t) ++ans;
        cout << ans - 1;
        return;
    }
    k -= m;
    while (k) {
        m = (int)x.size();
        ll new_x = -1, new_t = -1, cnt = -1;
        for (int i = 0; i < m - 1; ++i) {
            if (x[i].ss > t) continue;
            ll x1 = x[i].ff + (t - x[i].ss) / a + 1;
            if (x1 >= x[i + 1].ff) continue;
            ll t1 = x[i].ss + (x1 - x[i].ff) * c;
            if (t1 > t) continue;
            ll till = min(x[i + 1].ff - 1, x1 + (t - t1) / a);
            if ((till - x1 + 1) > cnt) {
                cnt = till - x1 + 1;
                new_x = x1;
                new_t = t1;
            }
        }
        if (new_x == -1) break;
        x.pub({ new_x,new_t });
        sort(all(x));
        k--;
    }
    ll cur, ans = 0;
    m = (int)x.size();
    for (int i = 0; i < m - 1; ++i) {
        cur = x[i].ss;
        if (cur > t) break;
        ll x1 = min(x[i + 1].ff - 1, x[i].ff + (t - cur) / a);
        ans += x1 - x[i].ff + 1ll;
    }
    if (x.back().ss <= t) ++ans;
    cout << ans - 1;
}

void cs() {
    int tstc = 1;
    //cin >> tstc;
    while (tstc--) {
        slv();
    }
}

void precalc() {
    return;
}

int main() {
    fastio();
    precalc();
    //precision(0);
    cs();
    return 0;
}

Compilation message (stderr)

semiexpress.cpp: In function 'll range_sum(ll, ll)':
semiexpress.cpp:97:21: warning: unused variable 'cnt' [-Wunused-variable]
   97 |     ll dif = a - 1, cnt = b - a + 1;
      |                     ^~~
semiexpress.cpp: In function 'll bin_to_dec(std::string)':
semiexpress.cpp:120:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  120 |     for (int i = 0; i < s.size(); i++) {
      |                     ~~^~~~~~~~~~

• Subtask 1: 18 / 18
• Subtask 2: 30 / 30
• Subtask 3: 52 / 52