Submission #1285705

#	Time	Username	Problem	Language	Result	Execution time	Memory
1285705		jackofall718	Fuel Station (NOI20_fuelstation)	C++20	13 / 100	99 ms	7240 KiB

FuelStation

#include <bits/stdc++.h>
#include <chrono>
#define ll long long int
#define endl '\n'

using namespace std;
using namespace std::chrono;
const ll INF = 4e18;

ll n, d;
vector<tuple<ll,ll,ll>> v;

bool valid(ll x) {
    ll curr = x;
    ll last = 0;
    for (auto &[a, b, c] : v) {
        ll dist = a - last;
        last = a;

        curr -= dist;
        if (curr < 0) return false;

        if (x <= c) {
            curr += b;
            if (curr > INF) curr = INF;
        }
    }
    return curr >= (d - last);
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    auto start = high_resolution_clock::now();

    cin >> n >> d;
    v.resize(n);
    for (int i = 0; i < n; i++) {
        cin >> get<0>(v[i]) >> get<1>(v[i]) >> get<2>(v[i]);
    }

    sort(v.begin(), v.end());

    ll l = 0, r = d, ans = d;
    while (l <= r) {
        ll mid = l + (r - l) / 2;
        if (valid(mid)) {
            ans = mid;
            r = mid - 1;
        } else {
            l = mid + 1;
        }
    }
    cout << ans << endl;

    auto stop = high_resolution_clock::now();
    auto duration = duration_cast<microseconds>(stop - start);
    // cout << "Time taken: " << duration.count() << " µs\n";
    return 0;
}

• Subtask 1: 0 / 7
• Subtask 2: 13 / 13
• Subtask 3: 0 / 17
• Subtask 4: 0 / 12
• Subtask 5: 0 / 19
• Subtask 6: 0 / 11
• Subtask 7: 0 / 21