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Submission #405160

# Submission time Handle Problem Language Result Execution time Memory
405160 2021-05-15T19:39:13 Z SirCovidThe19th Palembang Bridges (APIO15_bridge) C++14
100 / 100
 208 ms 6356 KB 
#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define pii pair<int, int>

int n, k; 
ll same, cross, lSum = 0, rSum = 0; 

vector<pii> diff; vector<ll> prefix, suffix;

priority_queue<int> l;
priority_queue<int, vector<int>, greater<int>> r;

bool cmp(pii a, pii b){
    return a.first+a.second < b.first+b.second;
}

void update(int x){
    if (l.size() <= r.size()){
        r.push(x); rSum += x;
        l.push(r.top()); lSum += r.top();
        rSum -= r.top(); r.pop();
    }
    else{
        l.push(x); lSum += x;
        r.push(l.top()); rSum += l.top();
        lSum -= l.top(); l.pop();
    }
}

int main(){
    
    cin >> k >> n; 
    for (int i = 0; i < n; i++){
        char a, b; int x, y; cin >> a >> x >> b >> y;
        if (a == b) same += abs(x-y);
        else diff.push_back({x, y});
    }

    if (diff.size() == 0){
        cout<<same; return 0;
    }

    sort(diff.begin(), diff.end(), cmp);
    prefix.resize(diff.size()); suffix.resize(diff.size());

    for (int i = 0; i < diff.size(); i++){
        update(diff[i].first); update(diff[i].second);
        prefix[i] = (rSum-l.top()*r.size()) + (l.top()*l.size()-lSum);
    }

    while (!l.empty()) l.pop();
    while (!r.empty()) r.pop();
    lSum = 0; rSum = 0;

    for (int i = diff.size()-1; i >= 0; i--){
        update(diff[i].first); update(diff[i].second);
        suffix[i] = (rSum-l.top()*r.size()) + (l.top()*l.size()-lSum);
    }

    cross = prefix[diff.size()-1];
    if (k == 2)
        for (int i = 0; i < diff.size()-1; i++) 
            cross = min(cross, prefix[i]+suffix[i+1]);
    
    cout<<same+cross+diff.size();
}

Compilation message

bridge.cpp: In function 'int main()':
bridge.cpp:48:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |     for (int i = 0; i < diff.size(); i++){
      |                     ~~^~~~~~~~~~~~~
bridge.cpp:64:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   64 |         for (int i = 0; i < diff.size()-1; i++)
      |                         ~~^~~~~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 2 ms 332 KB Output is correct
4 Correct 2 ms 332 KB Output is correct
5 Correct 3 ms 324 KB Output is correct
6 Correct 3 ms 332 KB Output is correct
7 Correct 2 ms 332 KB Output is correct
8 Correct 3 ms 328 KB Output is correct
9 Correct 3 ms 332 KB Output is correct
10 Correct 2 ms 296 KB Output is correct
11 Correct 2 ms 332 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 2 ms 332 KB Output is correct
4 Correct 2 ms 320 KB Output is correct
5 Correct 3 ms 332 KB Output is correct
6 Correct 2 ms 296 KB Output is correct
7 Correct 3 ms 300 KB Output is correct
8 Correct 2 ms 332 KB Output is correct
9 Correct 3 ms 280 KB Output is correct
10 Correct 2 ms 332 KB Output is correct
11 Correct 2 ms 344 KB Output is correct
12 Correct 93 ms 4656 KB Output is correct
13 Correct 195 ms 5296 KB Output is correct
14 Correct 143 ms 4824 KB Output is correct
15 Correct 116 ms 3860 KB Output is correct
16 Correct 127 ms 5532 KB Output is correct
17 Correct 176 ms 5300 KB Output is correct
18 Correct 165 ms 5520 KB Output is correct
19 Correct 181 ms 5608 KB Output is correct
20 Correct 163 ms 5312 KB Output is correct
21 Correct 174 ms 5344 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 292 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 292 KB Output is correct
5 Correct 1 ms 292 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 292 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 292 KB Output is correct
11 Correct 1 ms 288 KB Output is correct
12 Correct 1 ms 204 KB Output is correct

Subtask #4
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 292 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 292 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 292 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 2 ms 332 KB Output is correct
14 Correct 2 ms 332 KB Output is correct
15 Correct 3 ms 332 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 2 ms 204 KB Output is correct
18 Correct 2 ms 204 KB Output is correct
19 Correct 2 ms 308 KB Output is correct
20 Correct 2 ms 300 KB Output is correct
21 Correct 2 ms 304 KB Output is correct
22 Correct 3 ms 332 KB Output is correct
23 Correct 3 ms 332 KB Output is correct
24 Correct 2 ms 320 KB Output is correct

Subtask #5
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 288 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 292 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 2 ms 332 KB Output is correct
14 Correct 3 ms 300 KB Output is correct
15 Correct 3 ms 332 KB Output is correct
16 Correct 1 ms 292 KB Output is correct
17 Correct 2 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 3 ms 304 KB Output is correct
20 Correct 2 ms 300 KB Output is correct
21 Correct 2 ms 332 KB Output is correct
22 Correct 3 ms 332 KB Output is correct
23 Correct 2 ms 432 KB Output is correct
24 Correct 3 ms 332 KB Output is correct
25 Correct 89 ms 4600 KB Output is correct
26 Correct 162 ms 4792 KB Output is correct
27 Correct 179 ms 5596 KB Output is correct
28 Correct 203 ms 6356 KB Output is correct
29 Correct 198 ms 6208 KB Output is correct
30 Correct 106 ms 3440 KB Output is correct
31 Correct 123 ms 5468 KB Output is correct
32 Correct 172 ms 6252 KB Output is correct
33 Correct 160 ms 5812 KB Output is correct
34 Correct 178 ms 6216 KB Output is correct
35 Correct 138 ms 5776 KB Output is correct
36 Correct 208 ms 5944 KB Output is correct
37 Correct 79 ms 4576 KB Output is correct