Submission #889304

#	Time	Username	Problem	Language	Result	Execution time	Memory
889304		hafo	Coin Collecting (JOI19_ho_t4)	C++14	100 / 100	40 ms	7532 KiB

joi2019_ho_t4

#include <bits/stdc++.h>
#define ll long long
#define ull unsigned ll
#define pb push_back
#define pa pair<int, int>
#define pall pair<ll, int>
#define fi first
#define se second
#define TASK "test"
#define Size(x) (int) x.size()
#define all(x) x.begin(), x.end()
using namespace std;

template<typename T1, typename T2> bool mini (T1 &a, T2 b) {if(a > b) a = b; else return 0; return 1;}
template<typename T1, typename T2> bool maxi (T1 &a, T2 b) {if(a < b) a = b; else return 0; return 1;}

const int MOD = 1e9 + 7;
const int LOG = 20;
const int maxn = 2e5 + 7;
const ll oo = 1e18 + 69;

int n;
pa a[maxn];

struct sub2 {
    static const int maxn = 2e3 + 7;
    ll dp[maxn][maxn];

    void solve() {
        sort(a + 1, a + 1 + n);
        for(int i = 1; i <= n; i++) cout<<a[i].fi<<" "<<a[i].se<<"\n";
        for(int i = 0; i <= n; i++) {
            for(int j = 0; j <= n; j++) dp[i][j] = oo;
        }

        dp[0][0] = 0;
        for(int i = 1; i <= n; i++) {
            for(int j = 0; j <= min(i, n / 2); j++) {
                int rem = i - j;
                if(rem > n / 2) continue;
                if(j > 0) {
                    mini(dp[i][j], dp[i - 1][j - 1] + abs(a[i].fi - j) + abs(a[i].se - 1));
                }
                if(rem > 0) {
                    mini(dp[i][j], dp[i - 1][j] + abs(a[i].fi - rem) + abs(a[i].se - 2));
                }
            }
        }
        cout<<dp[n][n / 2];
    }

} sub2;

struct sub3 {
    int cnt[maxn][2], d[2];

    void solve() {
        ll ans = 0;
        for(int i = 1; i <= n; i++) {
            int x = a[i].fi, y = a[i].se;
            if(x < 1) {
                ans += 1 - x;
                x = 1;
            }
            if(x > n / 2) {
                ans += x - n / 2;
                x = n / 2;
            }
            if(y < 1) {
                ans += 1 - y;
                y = 1;
            }
            if(y > 2) {
                ans += y - 2;
                y = 2;
            }

            cnt[x][y - 1]++;
        }

        for(int i = 1; i <= n / 2; i++) {
            for(int j = 0; j < 2; j++) d[j] += cnt[i][j] - 1;
            
            for(int j = 0; j < 2; j++) {
                if(d[j] > 0 && d[j ^ 1] < 0) {
                    int t = min(d[j], - d[j ^ 1]);
                    ans += t;
                    d[j] -= t;
                    d[j ^ 1] += t;
                }
            }

            for(int j = 0; j < 2; j++) ans += abs(d[j]);
        }
        cout<<ans;
    }

} sub3;

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    //freopen(TASK".inp", "r", stdin);
    //freopen(TASK".out", "w", stdout);

    cin>>n;
    n *= 2;
    for(int i = 1; i <= n; i++) cin>>a[i].fi>>a[i].se;
    // sub2.solve();
    sub3.solve();
    return 0;
}

• Subtask 1: 8 / 8
• Subtask 2: 29 / 29
• Subtask 3: 63 / 63