Submission #1069912

#	Time	Username	Problem	Language	Result	Execution time	Memory
1069912		TheQuantiX	Shortcut (IOI16_shortcut)	C++17	31 / 100	2051 ms	26972 KiB

shortcut

#include <bits/stdc++.h>
#include "shortcut.h"

using namespace std;
using ll = long long;

constexpr ll INF = 1000000000000000000LL;

ll n, m, q, k, x, y, a, b, c;
vector< pair<ll, ll> > G[1000000];
deque< pair<ll, pair<ll, ll> > > v;
vector<ll> pref;

ll diam(ll x, ll y, ll c, vector<int> &d) {
    ll ans = 0;
    for (int i = 0; i < v.size(); i++) {
        if (v[i].first <= ans) {
            break;
        }
        // cout << '\t' << v[i].first << ' ' << d[v[i].second.first] + d[v[i].second.second] + abs(pref[v[i].second.first] - pref[x]) + c + abs(pref[v[i].second.second] - pref[y]) << ' ' << d[v[i].second.first] + d[v[i].second.second] + abs(pref[v[i].second.first] - pref[y]) + c + abs(pref[v[i].second.second] - pref[x]) << '\n';
        ans = max(ans, min({v[i].first, d[v[i].second.first] + d[v[i].second.second] + abs(pref[v[i].second.first] - pref[x]) + c + abs(pref[v[i].second.second] - pref[y]), d[v[i].second.first] + d[v[i].second.second] + abs(pref[v[i].second.first] - pref[y]) + c + abs(pref[v[i].second.second] - pref[x])}));
    }
    return ans;
}

long long find_shortcut(int n, vector<int> l, vector<int> d, int c) {
    for (int i = 0; i < n - 1; i++) {
        G[i].push_back({i + 1, l[i]});
        G[i + 1].push_back({i, l[i]});
    }
    pref.resize(n);
    for (int i = 0; i < n - 1; i++) {
        pref[i + 1] = pref[i] + l[i];
    }
    for (int i = 0; i < n; i++) {
        for (int j = i + 1; j < n; j++) {
            ll dist = pref[j] - pref[i];
            v.push_back({dist + d[i] + d[j], {i, j}});
        }
    }
    sort(v.rbegin(), v.rend());
    ll ans = INF;
    for (int i = 0; i < n; i++) {
        for (int j = i + 1; j < n; j++) {
            ll ans1 = diam(i, j, c, d);
            // cout << i << ' ' << j << ' ' << ans1 << '\n';
            ans = min(ans, ans1);
        }
    }
    return ans;
}

Compilation message (stderr)

shortcut.cpp: In function 'll diam(ll, ll, ll, std::vector<int>&)':
shortcut.cpp:16:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::deque<std::pair<long long int, std::pair<long long int, long long int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |     for (int i = 0; i < v.size(); i++) {
      |                     ~~^~~~~~~~~~

• Subtask 1: 9 / 9
• Subtask 2: 14 / 14
• Subtask 3: 8 / 8
• Subtask 4: 0 / 7
• Subtask 5: 0 / 33
• Subtask 6: 0 / 22
• Subtask 7: 0 / 4
• Subtask 8: 0 / 3