oj.uz

답안 #1110875

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1110875 2024-11-10T18:03:10 Z vladilius Palembang Bridges (APIO15_bridge) C++17
22 / 100
 33 ms 3704 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<int, int>;
using pil = pair<int, ll>;
#define pb push_back
#define ff first
#define ss second
const ll inf = numeric_limits<ll> :: max();

struct DS{
    struct node{
        int s1; ll s2;
        node *l, *r;
        node(){
            s1 = s2 = 0;
            l = r = 0;
        }
        node(int x, ll y){
            s1 = x; s2 = y;
            l = r = 0;
        }
        node(node *ls, node *rs){
            l = ls; r = rs;
            s1 = s2 = 0;
            if (l){
                s1 += l -> s1;
                s2 += l -> s2;
            }
            if (r){
                s1 += r -> s1;
                s2 += r -> s2;
            }
        }
    };
    node *rt;
    int n, cc;
    void init(){
        rt = new node();
        n = 1e9;
        cc = 0;
    }
    node* upd(node *v, int tl, int tr, int& p, int& x){
        if (tl == tr){
            return new node(v -> s1 + 1, v -> s2 + x);
        }
        int tm = (tl + tr) / 2;
        if (p <= tm){
            if (!(v -> l)) v -> l = new node();
            return new node(upd(v -> l, tl, tm, p, x), v -> r);
        }
        else {
            if (!(v -> r)) v -> r = new node();
            return new node(v -> l, upd(v -> r, tm + 1, tr, p, x));
        }
    }
    void upd(int p, int x){
        rt = upd(rt, 1, n, p, x);
    }
    pil get(node *v, int tl, int tr, int& l, int& r){
        if (l > tr || r < tl) return {0, 0};
        if (l <= tl && tr <= r){
            return {v -> s1, v -> s2};
        }
        int tm = (tl + tr) / 2;
        pil p1 = {0, 0}, p2 = {0, 0};
        if (v -> l) p1 = get(v -> l, tl, tm, l, r);
        if (v -> r) p2 = get(v -> r, tm + 1, tr, l, r);
        return {p1.ff + p2.ff, p1.ss + p2.ss};
    }
    pair<int, ll> get(int l, int r){
        return get(rt, 1, n, l, r);
    }
    multiset<int> s1, s2;
    void add(int x){
        cc++;
        s1.insert(x);
        if (s1.size() > s2.size()){
            int y = *prev(s1.end());
            s1.erase(s1.find(y));
            s2.insert(y);
        }
        if (!s1.empty() && !s2.empty()){
            int a = *prev(s1.end()), b = *s2.begin();
            if (a > b){
                s1.erase(s1.find(a));
                s2.erase(s2.find(b));
                s1.insert(b);
                s2.insert(a);
            }
        }
        upd(x, x);
    }
    ll get(){
        if (s2.empty()) return 0;
        int x = (cc % 2) ? *s2.begin() : *prev(s1.end());
        pil p1 = get(1, x), p2 = get(x + 1, n);
        return (1LL * x * p1.ff - p1.ss) + (p2.ss - 1LL * x * p2.ff);
    }
};

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    
    int k, n; cin>>k>>n;
    vector<pii> all;
    ll out = 0;
    while (n--){
        char t1, t2; int x1, y1; cin>>t1>>x1>>t2>>y1;
        if (t1 == t2){
            out += abs(x1 - y1);
            continue;
        }
        if (x1 > y1) swap(x1, y1);
        all.pb({x1, y1});
    }
    
    n = (int) all.size();
    vector<int> imp;
    for (int i = 0; i < n; i++){
        imp.pb(all[i].ff); imp.pb(all[i].ss);
    }

    ll mn = inf;
    if (k == 1){
        if (!all.empty()){
            vector<int> f;
            for (auto [x, y]: all){
                f.pb(x); f.pb(y);
            }
            sort(f.begin(), f.end());
            int x = f[(int) (f.size() - 1) / 2];
            ll sum = 0;
            for (int i: f){
                sum += abs(i - x);
            }
            mn = sum + n;
        }
    }
    else {
        ll S = 0;
        for (auto [x, y]: all){
            S += (y - x);
        }
        
        int h = (int) imp.size();
        sort(imp.begin(), imp.end());
        vector<ll> out1(h), out2(h), h1(h), h2(h);
        vector<pii> p1(h), p2(h);
        
        auto cmp = [&](pii x, pii y){
            return x.ss < y.ss;
        };
        
        sort(all.begin(), all.end(), cmp);
        int j = 0;
        DS T1; T1.init();
        for (int i = 0; i < h; i++){
            p2[i] = (!i) ? make_pair(0, 0) : p2[i - 1];
            h2[i] = (!i) ? 0 : h2[i - 1];
            while (j < n && all[j].ss < imp[i]){
                T1.add(all[j].ff);
                T1.add(all[j].ss);
                p2[i].ff++;
                p2[i].ss += (all[j].ff + all[j].ss);
                h2[i] += (all[j].ss - all[j].ff);
                j++;
            }
            out1[i] = T1.get();
        }

        sort(all.begin(), all.end());
        j = n - 1;
        DS T2; T2.init();
        for (int i = h - 1; i >= 0; i--){
            p1[i] = (i == (h - 1)) ? make_pair(0, 0) : p1[i + 1];
            h1[i] = (i == (h - 1)) ? 0 : h1[i + 1];
            while (j >= 0 && all[j].ff > imp[i]){
                T2.add(all[j].ff);
                T2.add(all[j].ss);
                p1[i].ff++;
                p1[i].ss += (all[j].ff + all[j].ss);
                h1[i] += (all[j].ss - all[j].ff);
                j--;
            }
            out2[i] = T2.get();
        }
        
        for (int j = 0; j < h; j++){
            int i = imp[j];
            ll sum = S - h1[j] - h2[j];
            ll s1 = out1[j] + p1[j].ss - 2LL * i * p1[j].ff;
            ll s2 = out2[j] + 2LL * i * p2[j].ff - p2[j].ss;
            
            mn = min(mn, sum + s1 + n);
            mn = min(mn, sum + s2 + n);
        }
    }
    if (mn == inf) mn = 0;
    cout<<out + mn<<"\n";
}

Subtask #1
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 336 KB Output is correct
11 Correct 1 ms 336 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 508 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 2 ms 500 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 504 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 21 ms 3408 KB Output is correct
13 Correct 33 ms 3408 KB Output is correct
14 Correct 24 ms 3408 KB Output is correct
15 Correct 18 ms 2132 KB Output is correct
16 Correct 20 ms 3704 KB Output is correct
17 Correct 22 ms 3408 KB Output is correct
18 Correct 24 ms 3408 KB Output is correct
19 Correct 31 ms 3408 KB Output is correct
20 Correct 21 ms 3572 KB Output is correct
21 Correct 29 ms 3408 KB Output is correct

Subtask #3
0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 592 KB Output is correct
4 Incorrect 2 ms 1360 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #4
0 / 32.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 592 KB Output is correct
4 Incorrect 2 ms 1360 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #5
0 / 37.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 592 KB Output is correct
4 Incorrect 1 ms 1360 KB Output isn't correct
5 Halted 0 ms 0 KB -