Submission #883818

#	Time	Username	Problem	Language	Result	Execution time	Memory
883818		MisterReaper	Palembang Bridges (APIO15_bridge)	C++17	22 / 100	46 ms	6520 KiB

bridge

#include <bits/stdc++.h>
using namespace std;
using i64 = long long;

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

    i64 total = 0;
    vector <int> a, all;
    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]);
            a.emplace_back(x[1]);
        } else {
            total += abs(x[0] - x[1]);
        }
        all.emplace_back(x[0]);
        all.emplace_back(x[1]);
    }

    sort(all.begin(), all.end());
    all.erase(unique(all.begin(), all.end()), all.end());

    n = int(a.size());

    i64 suml = 0, sumr = 0;
    vector <int> left, right;
    for(int i = 0; i < n; i++) {
        right.emplace_back(a[i]);
        sumr += a[i];
    }

    sort(right.begin(), right.end(), greater <> ());

    int m = int(all.size());
    i64 ans = sumr;
    for(int i = 0; i < m; i++) {
        while(!right.empty() && right.back() == all[i]) {
            left.emplace_back(right.back());
            suml += right.back();
            sumr -= right.back();
            right.pop_back();
        }

        //cerr << all[i] << " :: " << left << " " << right << " | " << suml << " " << sumr << " || " << int(left.size()) * all[i] - suml + sumr - int(right.size()) * all[i] << "\n";
        ans = min(ans, i64(left.size()) * all[i] - suml + sumr - i64(right.size()) * all[i]);
    }

    cout << ans + total + n / 2;
    
    return;
}

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);

    int t = 1; //cin >> t;
    for(int i = 1; i <= t; i++) {
        solve();
    }

    return 0;
}

• Subtask 1: 8 / 8
• Subtask 2: 14 / 14
• Subtask 3: 0 / 9
• Subtask 4: 0 / 32
• Subtask 5: 0 / 37