oj.uz

답안 #712994

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
712994 2023-03-20T18:30:17 Z MrKustic Palembang Bridges (APIO15_bridge) C++14
100 / 100
 209 ms 29200 KB 
#include <bits/stdc++.h>
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
#define all(x) x.begin(), x.end()
#define sz(x) (int)x.size()
#define pb emplace_back
#define x first
#define y second
#define ff first
#define ss second
 
using namespace std;
//using namespace __gnu_pbds;
 
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pt;
typedef pair<ll, ll> ptll;
typedef complex<double> ftype;
//typedef tree<int, null_type, less<>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;
//typedef gp_hash_table<int, int> table;
 
template <typename T1, typename T2>
istream& operator>>(istream& is, pair <T1, T2>& a){
    is >> a.ff >> a.ss;
    return is;
}
 
template<typename T>
istream &operator>>(istream &in, vector<T> &list){
    for (auto &x: list)
        in >> x;
    return in;
}
 
template <typename T1, typename T2>
ostream& operator<<(ostream& os, pair <T1, T2> a){
    os << a.ff << " " << a.ss << " ";
    return os;
}
 
template<typename T>
ostream &operator<<(ostream &out, const vector<T> &list) {
    for (auto x : list)
        out << x << " ";
    return out;
}
 
mt19937 rnd(31);
 
void fastio() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
}
 
 
//#pragma GCC optimize(3)
/*#pragma GCC target("avx,avx2,sse3,ssse3,sse4.1,sse4.2")
#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("inline")*/
 
 
//-------------------------------------------
 
const int MAXN = 2e5 + 10;
 
pt poses[MAXN];
vector<int> start[MAXN], stop[MAXN];
 
ll solve1(int n){
    if (n == 0)
        return 0;
    sort(poses, poses + n, [&](pt a, pt b){return a.y < b.y;});
    ll ans = 1e18;
    vector<int> xs;
    for (int i = 0; i < n; i++){
        xs.push_back(poses[i].x);
        xs.push_back(poses[i].y);
    }
    sort(all(xs));
    xs.resize(unique(all(xs)) - xs.begin());
    ll sum1 = 0, sum2 = 0, mid = 0;
    ll cnt1 = 0, cnt2 = 0, cntmid = 0;
    map<int, int> coords;
    for (int x: xs)
        coords[x] = 0;
    int tt = 0;
    for (auto &[x, y]: coords)
        y = tt++;
    for (int i = 0; i < n; i++){
        sum2 += poses[i].x + poses[i].y;
        cnt2++;
        start[coords[poses[i].x]].push_back(i);
        stop[coords[poses[i].y]].push_back(i);
    }
    for (int i = 0; i < sz(xs); i++){
        ll pos = xs[i];
        for (int j: start[i]){
            auto [x, y] = poses[j];
            sum2 -= x + y;
            mid += abs(x - y);
            cnt2--;
            cntmid++;
        }
        for (int j: stop[i]){
            auto [x, y] = poses[j];
            mid -= abs(x - y);
            sum1 += x + y;
            cntmid--;
            cnt1++;
        }
        ans = min(ans, 2 * pos * cnt1 - sum1 + mid + sum2 - 2 * pos * cnt2);
    }
    return ans + n;
}
 
ll res[MAXN];
 
ll solve2(int n){
    if (n == 0)
        return 0;
    if (n == 1)
        return poses[0].y - poses[0].x + 1;
    sort(poses, poses + n, [&](pt a, pt b){return a.x + a.y < b.x + b.y;});
    multiset<int> l, r;
    ll sl, sr;
    sl = sr = 0;
    ll ans = 1e18;
    for (int i = 0; i < n; i++){
        auto [x1, x2] = poses[i];
        for (int x: {x1, x2}) {
            if (i == 0 || x >= *r.begin()) {
                r.insert(x);
                sr += x;
            } else {
                l.insert(x);
                sl += x;
            }
        }
        while (sz(l) < sz(r)){
            int x = *r.begin();
            r.erase(r.begin());
            sr -= x;
            l.insert(x);
            sl += x;
        }
        while (sz(l) > sz(r) + 1){
            int x = *(--l.end());
            l.erase(--l.end());
            sl -= x;
            r.insert(x);
            sr += x;
        }
        ll x = *(--l.end());
        ll curr = x * sz(l) - sl + sr - x * sz(r);
        res[i] = curr;
    }
    l.clear();
    r.clear();
    sl = sr = 0;
    for (int i = n - 1; i > 0; i--){
        auto [x1, x2] = poses[i];
        for (int x: {x1, x2}) {
            if (i == 0 || x >= *r.begin()) {
                r.insert(x);
                sr += x;
            } else {
                l.insert(x);
                sl += x;
            }
        }
        while (sz(l) < sz(r)){
            int x = *r.begin();
            r.erase(r.begin());
            sr -= x;
            l.insert(x);
            sl += x;
        }
        while (sz(l) > sz(r) + 1){
            int x = *(--l.end());
            l.erase(--l.end());
            sl -= x;
            r.insert(x);
            sr += x;
        }
        ll x = *(--l.end());
        ll curr = x * sz(l) - sl + sr - x * sz(r);
        res[i - 1] += curr;
    }
    for (int i = 0; i < n - 1; i++)
        ans = min(ans, res[i]);
    return ans + n;
}
 
void run() {
    int k, n;
    k = 2;
    n = 1e5;
    cin >> k >> n;
    ll var = 0;
    int tt = 0;
    for (int i = 0; i < n; i++){
        char c1, c2;
        int pos1, pos2;
        c1 = 'A', c2 = 'B';
        pos1 = rnd() % 1000000000, pos2 = rnd() % 1000000000;
        cin >> c1 >> pos1 >> c2 >> pos2;
        if (pos1 > pos2)
            swap(pos1, pos2);
        if (c1 == c2){
            var += abs(pos1 - pos2);
        } else {
            poses[tt++] = {pos1, pos2};
        }
    }
    n = tt;
    if (k == 1){
        cout << var + solve1(n) << '\n';
    } else {
        cout << var + solve2(n) << '\n';
    }
}
 
int main() {
#ifdef LOCAL
    freopen("input.txt", "r", stdin);
#else
    fastio();
    //freopen("", "r", stdin);
    //freopen("", "w", stdout);
#endif
    auto start = chrono::high_resolution_clock::now();
    run();
    auto stop = chrono::high_resolution_clock::now();
#ifdef LOCAL
    cerr << "\nProgram finished in " << (ld)chrono::duration_cast<chrono::milliseconds>(stop - start).count() / 1e3 << " sec\n";
#endif
    return 0;
}

Compilation message

bridge.cpp: In function 'll solve1(int)':
bridge.cpp:88:16: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   88 |     for (auto &[x, y]: coords)
      |                ^
bridge.cpp:99:18: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   99 |             auto [x, y] = poses[j];
      |                  ^
bridge.cpp:106:18: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  106 |             auto [x, y] = poses[j];
      |                  ^
bridge.cpp: In function 'll solve2(int)':
bridge.cpp:130:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  130 |         auto [x1, x2] = poses[i];
      |              ^
bridge.cpp:162:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  162 |         auto [x1, x2] = poses[i];
      |              ^
bridge.cpp: In function 'int main()':
bridge.cpp:232:10: warning: variable 'start' set but not used [-Wunused-but-set-variable]
  232 |     auto start = chrono::high_resolution_clock::now();
      |          ^~~~~
bridge.cpp:234:10: warning: variable 'stop' set but not used [-Wunused-but-set-variable]
  234 |     auto stop = chrono::high_resolution_clock::now();
      |          ^~~~

Subtask #1
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 9684 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 6 ms 9744 KB Output is correct
4 Correct 6 ms 9892 KB Output is correct
5 Correct 6 ms 9872 KB Output is correct
6 Correct 6 ms 9748 KB Output is correct
7 Correct 6 ms 9876 KB Output is correct
8 Correct 6 ms 9812 KB Output is correct
9 Correct 6 ms 9812 KB Output is correct
10 Correct 6 ms 9684 KB Output is correct
11 Correct 5 ms 9812 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 5 ms 9736 KB Output is correct
3 Correct 5 ms 9684 KB Output is correct
4 Correct 6 ms 9812 KB Output is correct
5 Correct 6 ms 9812 KB Output is correct
6 Correct 6 ms 9684 KB Output is correct
7 Correct 6 ms 9872 KB Output is correct
8 Correct 6 ms 9812 KB Output is correct
9 Correct 6 ms 9812 KB Output is correct
10 Correct 6 ms 9748 KB Output is correct
11 Correct 6 ms 9908 KB Output is correct
12 Correct 29 ms 13512 KB Output is correct
13 Correct 161 ms 29200 KB Output is correct
14 Correct 63 ms 14092 KB Output is correct
15 Correct 86 ms 21120 KB Output is correct
16 Correct 42 ms 14212 KB Output is correct
17 Correct 98 ms 29192 KB Output is correct
18 Correct 102 ms 28868 KB Output is correct
19 Correct 105 ms 28776 KB Output is correct
20 Correct 37 ms 14304 KB Output is correct
21 Correct 105 ms 29120 KB Output is correct

Subtask #3
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 9724 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 5 ms 9684 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 6 ms 9736 KB Output is correct
6 Correct 5 ms 9736 KB Output is correct
7 Correct 5 ms 9684 KB Output is correct
8 Correct 6 ms 9744 KB Output is correct
9 Correct 5 ms 9736 KB Output is correct
10 Correct 5 ms 9684 KB Output is correct
11 Correct 6 ms 9704 KB Output is correct
12 Correct 5 ms 9732 KB Output is correct

Subtask #4
32.0 / 32.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 9684 KB Output is correct
2 Correct 5 ms 9736 KB Output is correct
3 Correct 5 ms 9736 KB Output is correct
4 Correct 6 ms 9732 KB Output is correct
5 Correct 6 ms 9684 KB Output is correct
6 Correct 5 ms 9684 KB Output is correct
7 Correct 5 ms 9684 KB Output is correct
8 Correct 5 ms 9736 KB Output is correct
9 Correct 5 ms 9684 KB Output is correct
10 Correct 5 ms 9684 KB Output is correct
11 Correct 5 ms 9684 KB Output is correct
12 Correct 7 ms 9736 KB Output is correct
13 Correct 6 ms 9732 KB Output is correct
14 Correct 6 ms 9812 KB Output is correct
15 Correct 7 ms 9744 KB Output is correct
16 Correct 6 ms 9684 KB Output is correct
17 Correct 6 ms 9740 KB Output is correct
18 Correct 6 ms 9684 KB Output is correct
19 Correct 6 ms 9744 KB Output is correct
20 Correct 6 ms 9812 KB Output is correct
21 Correct 6 ms 9748 KB Output is correct
22 Correct 8 ms 9804 KB Output is correct
23 Correct 6 ms 9828 KB Output is correct
24 Correct 6 ms 9812 KB Output is correct

Subtask #5
37.0 / 37.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 5 ms 9732 KB Output is correct
4 Correct 5 ms 9736 KB Output is correct
5 Correct 5 ms 9736 KB Output is correct
6 Correct 6 ms 9736 KB Output is correct
7 Correct 5 ms 9684 KB Output is correct
8 Correct 5 ms 9688 KB Output is correct
9 Correct 6 ms 9684 KB Output is correct
10 Correct 5 ms 9688 KB Output is correct
11 Correct 5 ms 9684 KB Output is correct
12 Correct 5 ms 9684 KB Output is correct
13 Correct 7 ms 9740 KB Output is correct
14 Correct 6 ms 9812 KB Output is correct
15 Correct 6 ms 9744 KB Output is correct
16 Correct 5 ms 9684 KB Output is correct
17 Correct 5 ms 9684 KB Output is correct
18 Correct 6 ms 9684 KB Output is correct
19 Correct 6 ms 9748 KB Output is correct
20 Correct 6 ms 9812 KB Output is correct
21 Correct 6 ms 9812 KB Output is correct
22 Correct 6 ms 9812 KB Output is correct
23 Correct 6 ms 9812 KB Output is correct
24 Correct 6 ms 9744 KB Output is correct
25 Correct 127 ms 21452 KB Output is correct
26 Correct 205 ms 21632 KB Output is correct
27 Correct 198 ms 22372 KB Output is correct
28 Correct 209 ms 22992 KB Output is correct
29 Correct 202 ms 23152 KB Output is correct
30 Correct 82 ms 16624 KB Output is correct
31 Correct 114 ms 22272 KB Output is correct
32 Correct 143 ms 22896 KB Output is correct
33 Correct 95 ms 22628 KB Output is correct
34 Correct 142 ms 23104 KB Output is correct
35 Correct 135 ms 22536 KB Output is correct
36 Correct 145 ms 22756 KB Output is correct
37 Correct 140 ms 21464 KB Output is correct