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Submission #883827

# Submission time Handle Problem Language Result Execution time Memory
883827 2023-12-06T07:26:30 Z MisterReaper Palembang Bridges (APIO15_bridge) C++17
22 / 100
 110 ms 11552 KB 
#include <bits/stdc++.h>
using namespace std;
using i64 = long long;

const i64 INF = 1E18;

char ch[2];
int x[2];

template <typename T>
ostream& operator<< (ostream &out, vector <T> vec) {
    out << "{";
    for(int i = 0; i < int(vec.size()); i++) {
        out << vec[i];
        if(i +1 < int(vec.size())) {
            out << ", ";
        }
    }

    return out << "}";
}

#define ONLINE_JUDGE

i64 suml = 0, sumr = 0;
multiset <int> low, up;

void balance() {
    while(int(low.size()) > int(up.size())) {
        int x = *low.rbegin();
        up.emplace(x);
        suml -= x;
        sumr += x;
        low.erase(low.find(x));
    }


    while(int(up.size()) > int(low.size())) {
        int x = *up.begin();
        low.emplace(x);
        suml += x;
        sumr -= x;
        up.erase(up.find(x));
    }
}

void add(int x) {
    low.emplace(x);
    suml += x;

    balance();
}

void solve() {
    int k, n;
    cin >> k >> n;

    i64 total = 0;
    vector <pair <int, int>> a;
    for(int i = 0; i < n; i++) {
        cin >> ch[0] >> x[0] >> ch[1] >> x[1];
        if(ch[0] != ch[1]) {
            a.emplace_back(x[0], x[1]);
        } else {
            total += abs(x[0] - x[1]);
        }
    }

    n = int(a.size());
    i64 ans = INF;

    sort(a.begin(), a.end(), [&](pair <int, int> a, pair <int, int> b) -> bool {
        return (a.second != b.second ? a.second < b.second : a.first < b.first);
    });

    vector <i64> pref(n +1);
    for(int i = 0; i < n; i++) {
        add(a[i].first);
        add(a[i].second);

        //cerr << a[i].first << " " << a[i].second << " :: " << sumr << " " << suml << "\n";
        pref[i +1] = sumr - suml;
    }

    ans = min(ans, pref[n]);

    if(k == 2) {
        low.clear();
        up.clear();
        suml = sumr = 0;

        for(int i = n; i >= 1; i--) {
            add(a[i -1].first);
            add(a[i -1].second);

            //cerr << a[i].first << " " << a[i].second << " :: " << sumr << " " << suml << " | " << pref[i -1] << "\n";
            ans = min(ans, pref[i -1] + sumr - suml);
        }
    }

    cout << ans + total + n;
}

signed main() {
    #ifndef ONLINE_JUDGE
        freopen("in.txt", "r", stdin);
        freopen("out.txt", "w", stdout);
    #endif

    ios_base::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);

    solve();

    return 0;
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 600 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 97 ms 11288 KB Output is correct
13 Correct 95 ms 11280 KB Output is correct
14 Correct 87 ms 10228 KB Output is correct
15 Correct 54 ms 6780 KB Output is correct
16 Correct 95 ms 11180 KB Output is correct
17 Correct 93 ms 11212 KB Output is correct
18 Correct 110 ms 11460 KB Output is correct
19 Correct 104 ms 11216 KB Output is correct
20 Correct 95 ms 11160 KB Output is correct
21 Correct 97 ms 11552 KB Output is correct

Subtask #3
0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Incorrect 0 ms 348 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #4
0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Incorrect 0 ms 348 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #5
0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Incorrect 0 ms 348 KB Output isn't correct
5 Halted 0 ms 0 KB -