Submission #412481

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
412481	2021-05-27 01:22:09	tatyam	Road Closures (APIO21_roads)	C++17	100 / 100	456 ms	43188 KiB

roads

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#include <bits/stdc++.h>
using namespace std;
using ll = long long;
struct Edges{
    multiset<int> w, w2;
    ll sum = 0;
    void add(int x){
        sum += x;
        w.insert(x);
    }
    void erase(int x){
        if(auto p = w.find(x); p != w.end()){
            w.erase(p);
            sum -= x;
        }
        else{
            w2.erase(w2.find(x));
        }
    }
    pair<ll, vector<int>> topk_sum(int k, int deg){
        while(w2.size() && w.size() < k){
            auto p = prev(w2.end());
            sum += *p;
            w.insert(w.begin(), *p);
            w2.erase(p);
        }
        while(w.size() > k){
            auto p = w.begin();
            sum -= *p;
 
 
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Compilation message (stderr)

roads.cpp: In member function 'std::pair<long long int, std::vector<int> > Edges::topk_sum(int, int)':
roads.cpp:22:37: warning: comparison of integer expressions of different signedness: 'std::multiset<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   22 |         while(w2.size() && w.size() < k){
      |                            ~~~~~~~~~^~~
roads.cpp:28:24: warning: comparison of integer expressions of different signedness: 'std::multiset<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   28 |         while(w.size() > k){
      |               ~~~~~~~~~^~~
roads.cpp:34:21: warning: comparison of integer expressions of different signedness: 'std::multiset<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   34 |         if(w.size() <= k - deg){
      |            ~~~~~~~~~^~~~~~~~~~
roads.cpp: In function 'std::vector<long long int> minimum_closure_costs(int, std::vector<int>, std::vector<int>, std::vector<int>)':
roads.cpp:110:50: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  110 |         while(idx.size() && G[idx.back()].size() == k){
      |                             ~~~~~~~~~~~~~~~~~~~~~^~~~
roads.cpp: In instantiation of 'minimum_closure_costs(int, std::vector<int>, std::vector<int>, std::vector<int>)::<lambda(int, int, int, auto:24)> [with auto:24 = minimum_closure_costs(int, std::vector<int>, std::vector<int>, std::vector<int>)::<lambda(int, int, int, auto:24)>]':
roads.cpp:117:47:   required from here
roads.cpp:101:28: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'const int' [-Wsign-compare]
  101 |             if(diff.size() < deg){
      |                ~~~~~~~~~~~~^~~~~

• Subtask 1: 5 / 5
• Subtask 2: 7 / 7
• Subtask 3: 14 / 14
• Subtask 4: 10 / 10
• Subtask 5: 17 / 17
• Subtask 6: 25 / 25
• Subtask 7: 22 / 22