Submission #1051749

#	Time	Username	Problem	Language	Result	Execution time	Memory
1051749		VahanAbraham	Semiexpress (JOI17_semiexpress)	C++17	100 / 100	10 ms	6100 KiB

semiexpress

#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <string>
#include <algorithm>
#include <cstring>
#include <cstdio>
#include <sstream>
#include <map>
#include <stack>
#include <set>
#include <queue>
#include <list>
#include <unordered_set>
#include <unordered_map>
#include <math.h>
#include <bitset>
#include <cmath>
#include <vector>
#include <iomanip>
#include <random>
#include <chrono>
#include <cassert>

using namespace std;

#define ll long long
#define fr first
#define sc second
#define pb push_back
#define US freopen(".in", "r", stdin); freopen("j.out", "w", stdout);

ll gcd(ll a, ll b)
{
    if (a == 0 || b == 0) {
        return  max(a, b);
    }
    if (a <= b) {
        return gcd(a, b % a);
    }
    else {
        return gcd(a % b, b);
    }
}
ll lcm(ll a, ll b) {
    return (a / gcd(a, b)) * b;
}

const int N = 300005;
const ll oo = 100000000000000000, MOD = 1000000007;

ll s[N];

void solve() {
    ll n;
    int m, k;
    ll A, B, C;
    ll T;
    cin >> n >> m >> k >> A >> B >> C >> T;
    for (int i = 1; i <= m; ++i) {
        cin >> s[i];
    }
    ll ans = 0;
    vector<ll> vec;
    int diff = k - m;
    for (int i = 1; i <= m-1;++i) {
        ll sum = (s[i]-1) * B;
        ll cnt = T - sum;
        if (cnt >= 0) {
            ans++;
            cnt /= A;
            if (s[i] + cnt >= s[i + 1]) {
                //cout << ":AS " << i << endl;
                ans += (s[i + 1] - 1 - (s[i] + 1)) + 1;
            }
            else {
                ans += cnt;
            }
            ll last = s[i] + cnt;
            ll sum2 = 0;
            for (int j = 1; j <= diff; ++j) {
                if (last + 1 < s[i + 1]) {
                    ll sum1 = (s[i] - 1) * B + C * (last + 1 - s[i]);
                    cnt = T - sum1;
                    if (cnt < 0) {
                        break;
                    }
                    else {
                        cnt /= A;
                        if (last + cnt + 1 < s[i + 1]) {
                            vec.pb(cnt + 1);
                            //sum2 += vec.back();
                        }
                        else {
                            vec.pb((s[i + 1] - 1 - (last + 1)) + 1);
                            //sum2 += vec.back();
                        }
                    }
                    last = last + 1 + cnt;
                }
                else {
                    break;
                }
            }
            //cout << i << " " << sum2 << endl;
        }
        //cout << i << " " << ans << endl;
    }
    if ((n-1) * B <= T) {
        ++ans;
    }
    //cout <<"BOOM "<< ans << endl;
    int q = 0;
    sort(vec.begin(), vec.end());
    for (int i = vec.size()-1; i >= 0; --i) {
        if (q >= diff) {
            break;
        }
        //cout << vec[i] << endl;
        ans += vec[i];
        ++q;
    }
    cout << ans - 1 << endl;
}

int main() {
    ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
    //US
    int tt = 1;
    //cin >> tt;
    while (tt--) {
        solve();
    }
}

Compilation message (stderr)

semiexpress.cpp: In function 'void solve()':
semiexpress.cpp:79:16: warning: unused variable 'sum2' [-Wunused-variable]
   79 |             ll sum2 = 0;
      |                ^~~~

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