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Submission #343467

# Submission time Handle Problem Language Result Execution time Memory
343467 2021-01-04T00:45:33 Z eyangch Pinball (JOI14_pinball) C++17
100 / 100
 228 ms 9452 KB 
/*
Solution: O(M logM)
Have two strictly increasing maps to store the required cost for left boundaries and right boundaries.
(Strictly increasing allows retrieval of min cost for a device in O(logN) time)
*/

#include <bits/stdc++.h>
#define int long long

using namespace std;

struct si_map{
    map<int, int> mp;

    void insert(int x, int v){
        auto it = mp.lower_bound(x);
        if(it != mp.end() && it->second <= v){
            return;
        }
        if(it != mp.begin()){
            it--;
            vector<int> rm;
            while(true){
                if(it->second < v){
                    break;
                }
                rm.push_back(it->first);
                if(it == mp.begin()){
                    break;
                }
                it--;
            }
            for(int i : rm){
                mp.erase(i);
            }
        }
        //cout << "INSERT: " << x << " " << v << endl;
        mp[x] = v;
    }

    int qry(int x){
        auto it = mp.lower_bound(x);
        if(it == mp.end()){
            return 1e16;
        }
        return it->second;
    }
};

int M, N;
si_map l, r;

int32_t main(){
    cin >> M >> N;
    int ans = 1e16;
    l.insert(1, 0);
    r.insert(-N, 0);
    for(int i = 0; i < M; i++){
        int a, b, c, d; cin >> a >> b >> c >> d;
        int lcost = l.qry(a), rcost = r.qry(-b);
        ans = min(ans, lcost + rcost + d);
        l.insert(c, lcost + d);
        r.insert(-c, rcost + d); 
    }
    cout << (ans == 1e16 ? -1 : ans) << endl;
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 0 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 0 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 384 KB Output is correct

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 0 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 384 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 2 ms 364 KB Output is correct
18 Correct 2 ms 384 KB Output is correct
19 Correct 3 ms 364 KB Output is correct
20 Correct 2 ms 364 KB Output is correct
21 Correct 1 ms 492 KB Output is correct
22 Correct 2 ms 364 KB Output is correct
23 Correct 2 ms 364 KB Output is correct
24 Correct 2 ms 364 KB Output is correct

Subtask #4
49.0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 0 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 384 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 2 ms 364 KB Output is correct
18 Correct 2 ms 384 KB Output is correct
19 Correct 3 ms 364 KB Output is correct
20 Correct 2 ms 364 KB Output is correct
21 Correct 1 ms 492 KB Output is correct
22 Correct 2 ms 364 KB Output is correct
23 Correct 2 ms 364 KB Output is correct
24 Correct 2 ms 364 KB Output is correct
25 Correct 15 ms 620 KB Output is correct
26 Correct 44 ms 1260 KB Output is correct
27 Correct 113 ms 2796 KB Output is correct
28 Correct 169 ms 4076 KB Output is correct
29 Correct 86 ms 2288 KB Output is correct
30 Correct 170 ms 4332 KB Output is correct
31 Correct 170 ms 4204 KB Output is correct
32 Correct 173 ms 4204 KB Output is correct
33 Correct 43 ms 1772 KB Output is correct
34 Correct 101 ms 2412 KB Output is correct
35 Correct 228 ms 9452 KB Output is correct
36 Correct 172 ms 4204 KB Output is correct
37 Correct 188 ms 5228 KB Output is correct
38 Correct 190 ms 5740 KB Output is correct