Submission #407183

#	Time	Username	Problem	Language	Result	Execution time	Memory
407183		rocks03	Shortcut (IOI16_shortcut)	C++14	23 / 100	2083 ms	288 KiB

shortcut

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int, int>
#define pll pair<ll, ll>
#define ff first
#define ss second
#define pb push_back
#define SZ(x) ((int)(x).size())
#define all(x) x.begin(), x.end()
#define debug(x) cout << #x << ": " << x << " "
#define nl cout << "\n"
#define rep(i, a, b) for(int i = (a); i <= (b); i++)
#define per(i, a, b) for(int i = (a); i >= (b); i--)
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

long long find_shortcut(int N, vector<int> l, vector<int> p, int C){
    vector<ll> D(N), P(N);
    rep(i, 0, N - 1){
        if(i) D[i] = D[i - 1] + l[i - 1];
        P[i] = p[i];
    }
    auto dist = [&](int i, int j, int l, int r){
        ll ans;
        if(i == j){
            ans = 0; return ans;
        }
        if(i < j && j < l && l < r){
            ans = (D[j] + P[j]) - (D[i] - P[i]); return ans;
        }
        if(i < l && l < j && j < r){
            ans = min(D[j], D[l] + C + D[r] - D[j]) - (D[i] - P[i]) + P[j]; return ans;
        }
        if(i < l && l < r && r < j){
            ans = min(D[j], D[l] + C + D[j] - D[r]) - (D[i] - P[i]) + P[j]; return ans;
        }
        ans = P[i] + P[j] + min({D[j] - D[i], C + abs(D[j] - D[r]) + abs(D[l] - D[i]), C + abs(D[j] - D[l])+ abs(D[r] - D[i])});
        return ans;
    };
    auto diameter = [&](int l, int r){
        ll ans = 0;
        rep(i, 0, N - 1){
            rep(j, i + 1, N - 1){
                ans = max(ans, dist(i, j, l, r));
            }
        }
        return ans;
    };
    ll ans = LLONG_MAX;
    rep(i, 0, N - 1){
        rep(j, i + 1, N - 1){
            ans = min(ans, diameter(i, j));
        }
    }
    return ans;
}

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