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Submission #350735

# Submission time Handle Problem Language Result Execution time Memory
350735 2021-01-19T07:56:30 Z sofaman Palembang Bridges (APIO15_bridge) C++14
100 / 100
 106 ms 5736 KB 
#include <bits/stdc++.h>
#define FOR(i, x, y) for (int i = x; i < y; i++)
typedef long long ll;
using namespace std;
 
bool cmp(pair<int, int> a, pair<int, int> b) { return a.first + a.second < b.first + b.second; }

priority_queue<int> lpq;
priority_queue<int, vector<int>, greater<int>> rpq;
ll lsum, rsum;

void insert(int x) {
    int median = (lpq.size() ? lpq.top() : 1000000001);
    if (x <= median) {
        lpq.push(x);
        lsum += x;
    } else {
        rpq.push(x);
        rsum += x;
    }

    if (rpq.size() + 1 < lpq.size()) {
        int nxt = lpq.top();
        lpq.pop();
        rpq.push(nxt);
        lsum -= nxt;
        rsum += nxt;
    } else if (lpq.size() < rpq.size()) {
        int nxt = rpq.top();
        rpq.pop();
        lpq.push(nxt);
        rsum -= nxt;
        lsum += nxt;
    }
}

ll pref[100001];

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int k, n;
    ll same_side = 0;
    vector<pair<int, int>> v = {{0, 0}};
    cin >> k >> n;
    FOR(i, 0, n) {
        char a, b;
        int x, y;
        cin >> a >> x >> b >> y;
        if (a == b) same_side += abs(x - y);
        else v.push_back({x, y});
    }
    sort(v.begin(), v.end(), cmp);
    n = v.size() - 1;
    same_side += n;
    
    lsum = rsum = 0;
    FOR(i, 1, n + 1) {
        insert(v[i].first);
        insert(v[i].second);
        pref[i] = rsum - lsum;
    }

    ll ans = pref[n];
    
    if (k == 2) {
        while (lpq.size()) lpq.pop();
        while (rpq.size()) rpq.pop();
        lsum = rsum = 0;
        
        for (int i = n; i; i--) {
            insert(v[i].first);
            insert(v[i].second);
            ans = min(ans, rsum - lsum + pref[i - 1]);
        }
    }
    cout << same_side + ans;
    return 0;
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 404 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 492 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 32 ms 3944 KB Output is correct
13 Correct 63 ms 5608 KB Output is correct
14 Correct 55 ms 4584 KB Output is correct
15 Correct 35 ms 3564 KB Output is correct
16 Correct 47 ms 4968 KB Output is correct
17 Correct 52 ms 5480 KB Output is correct
18 Correct 48 ms 5500 KB Output is correct
19 Correct 61 ms 5484 KB Output is correct
20 Correct 42 ms 5480 KB Output is correct
21 Correct 56 ms 5224 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct

Subtask #4
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 492 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 492 KB Output is correct
20 Correct 2 ms 364 KB Output is correct
21 Correct 2 ms 364 KB Output is correct
22 Correct 2 ms 364 KB Output is correct
23 Correct 1 ms 364 KB Output is correct
24 Correct 1 ms 364 KB Output is correct

Subtask #5
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 492 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 2 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 2 ms 364 KB Output is correct
22 Correct 2 ms 364 KB Output is correct
23 Correct 1 ms 364 KB Output is correct
24 Correct 1 ms 364 KB Output is correct
25 Correct 50 ms 3964 KB Output is correct
26 Correct 74 ms 4584 KB Output is correct
27 Correct 99 ms 5096 KB Output is correct
28 Correct 102 ms 5736 KB Output is correct
29 Correct 106 ms 5480 KB Output is correct
30 Correct 64 ms 3180 KB Output is correct
31 Correct 56 ms 4840 KB Output is correct
32 Correct 95 ms 5632 KB Output is correct
33 Correct 91 ms 5096 KB Output is correct
34 Correct 96 ms 5480 KB Output is correct
35 Correct 54 ms 5480 KB Output is correct
36 Correct 79 ms 5320 KB Output is correct
37 Correct 37 ms 3944 KB Output is correct