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Submission #971348

# Submission time Handle Problem Language Result Execution time Memory
971348 2024-04-28T11:44:17 Z socpite Palembang Bridges (APIO15_bridge) C++14
100 / 100
 493 ms 29940 KB 
#include<bits/stdc++.h>
using namespace std;
 
long long INF = 1e18;
const int maxn = 1e5+5;
 
vector<int> cp;
 
vector<pair<int, int>> vec;
 
bool cmp(pair<int, int> a, pair<int, int> b){
    return a.first + a.second < b.first + b.second;
}

map<int, long long> mp[2];
long long pfx[maxn], sfx[maxn];

long long crr = -1, a, b;

void init(){
    mp[0].clear();
    mp[1].clear();
    mp[0][-1] = 0;
    crr = -1;
    a = 0;
    b = 0;
}

void upd_crr() {
    while(a < 0){
        crr = mp[0].upper_bound(crr)->first;
        a += mp[0][crr];
        b += mp[1][crr];
    }
    while(a > 0){
        a -= mp[0][crr];
        b -= mp[1][crr];
        crr = prev(mp[0].lower_bound(crr))->first;
    }
}

long long get_ans(){
    long long re = crr*a + b;
    auto it = mp[0].upper_bound(crr);
    if(it != mp[0].end())re = min(re, it->first*(a+it->second) + mp[1][it->first] + b);
    return re;
}

void add_new(int l, int r){
    if(crr < l){
        a--;
        b += l;
    }
    if(crr >= r){
        a++;
        b -= r;
    }
    mp[0][l]++;
    mp[0][r]++;
    mp[1][l]-=l;
    mp[1][r]-=r;
    upd_crr();
}

int k, n;
 
int main(){
    ios::sync_with_stdio(false);
    cin >> k >> n;
    long long ans = INF;
    long long base = 0;
    for(int i = 0; i < n; i++){
        char t1, t2;
        pair<int, int> p;
        cin >> t1 >> p.first >> t2 >> p.second;
        if(p.first > p.second)swap(p.first, p.second);
        base += p.second - p.first;
        if(t1 != t2) {
            base++;
            vec.push_back(p);
            cp.push_back(p.first);
            cp.push_back(p.second);
        }
    }
    if(vec.empty()){
        cout << base;
        return 0;
    }
    sort(vec.begin(), vec.end(), cmp);
    init();
    for(int i = 0; i < vec.size(); i++){
        add_new(vec[i].first, vec[i].second);
        pfx[i] = get_ans();
    }
    if(k == 1){
        cout << base + pfx[vec.size()-1]*2;
        return 0;
    }
    init();
    for(int i = vec.size()-1; i >= 0; i--){
        add_new(vec[i].first, vec[i].second);
        sfx[i] = get_ans();
        if(i)ans = min(ans, pfx[i-1] + sfx[i]);
        else ans = min(ans, sfx[i]);
    }
    cout << base + ans*2;
    
}

Compilation message

bridge.cpp: In function 'int main()':
bridge.cpp:91:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   91 |     for(int i = 0; i < vec.size(); i++){
      |                    ~~^~~~~~~~~~~~

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 0 ms 348 KB Output is correct
4 Correct 1 ms 612 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 688 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 768 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 604 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 344 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 620 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 604 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 592 KB Output is correct
12 Correct 22 ms 3772 KB Output is correct
13 Correct 201 ms 29884 KB Output is correct
14 Correct 67 ms 4812 KB Output is correct
15 Correct 99 ms 17800 KB Output is correct
16 Correct 24 ms 4552 KB Output is correct
17 Correct 137 ms 29880 KB Output is correct
18 Correct 102 ms 29624 KB Output is correct
19 Correct 129 ms 28860 KB Output is correct
20 Correct 29 ms 4792 KB Output is correct
21 Correct 150 ms 29940 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct

Subtask #4
32.0 / 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 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 2 ms 604 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 2 ms 856 KB Output is correct
21 Correct 2 ms 604 KB Output is correct
22 Correct 2 ms 604 KB Output is correct
23 Correct 1 ms 600 KB Output is correct
24 Correct 2 ms 600 KB Output is correct

Subtask #5
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 600 KB Output is correct
15 Correct 2 ms 604 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 2 ms 604 KB Output is correct
21 Correct 1 ms 604 KB Output is correct
22 Correct 2 ms 600 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 2 ms 604 KB Output is correct
25 Correct 26 ms 4036 KB Output is correct
26 Correct 45 ms 3772 KB Output is correct
27 Correct 399 ms 26048 KB Output is correct
28 Correct 493 ms 28688 KB Output is correct
29 Correct 465 ms 28532 KB Output is correct
30 Correct 193 ms 15460 KB Output is correct
31 Correct 25 ms 3776 KB Output is correct
32 Correct 252 ms 28604 KB Output is correct
33 Correct 220 ms 28748 KB Output is correct
34 Correct 220 ms 27340 KB Output is correct
35 Correct 32 ms 3776 KB Output is correct
36 Correct 265 ms 28532 KB Output is correct
37 Correct 26 ms 3784 KB Output is correct