Submission #400281

#	Time	Username	Problem	Language	Result	Execution time	Memory
400281		rocks03	Aliens (IOI16_aliens)	C++14	12 / 100	243 ms	324 KiB

aliens

#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 take_photos(int N, int M, int K, vector<int> X, vector<int> Y){
    vector<pll> v(N);
    rep(i, 0, N) v[i] = {X[i], Y[i]};
    sort(all(v));
    vector<ll> dp(N + 1, LLONG_MAX), dp2;
    dp[0] = 0;
    dp2 = dp;
    rep(k, 1, K + 1){
        rep(i, 0, N){
            ll mn, mx;
            mn = min(v[i].ff, v[i].ss);
            mx = max(v[i].ff, v[i].ss);
            per(j, i, 0){
                mn = min({mn, v[j].ff, v[j].ss});
                mx = max({mx, v[j].ff, v[j].ss});
                ll cost = (mx - mn + 1) * (mx - mn + 1);
                if(dp[j] != LLONG_MAX){
                    dp2[i + 1] = min(dp2[i + 1], dp[j] + cost);
                }
            }
        }
        swap(dp, dp2);
    }
    return dp[N];
}

• Subtask 1: 0 / 4
• Subtask 2: 12 / 12
• Subtask 3: 0 / 9
• Subtask 4: 0 / 16
• Subtask 5: 0 / 19
• Subtask 6: 0 / 40