Submission #766389

#	Time	Username	Problem	Language	Result	Execution time	Memory
766389		ivopav	Palembang Bridges (APIO15_bridge)	C++17	0 / 100	1 ms	212 KiB

bridge

#include <bits/stdc++.h>
using namespace std;

int main(){
    int n;
    int k;
    cin >> k >> n;
    int isp=0;
    vector<pair<int,int>> lis={};
    for (int i=0;i<n;i++){
        char prvgdje;
        int prv;
        char drugdje;
        int dru;
        cin >> prvgdje >> prv >> drugdje >> dru;
        if (prvgdje==drugdje){
            isp+=abs(prv-dru);
        }
        else {
            lis.push_back({prv,dru});
        }
    }
    int poc=0;
    int kra=1000000001;
    int sre=kra/2;
    while (poc<sre){
        int zbr1=0;
        int zbr2=0;
        for (int i=0;i<lis.size();i++){
            zbr1+=abs(sre-lis[i].first)+abs(sre-lis[i].second);
            zbr2+=abs(sre+1-lis[i].first)+abs(sre+1-lis[i].second);
        }
        if (zbr1==zbr2){
            break;
        }
        else if (zbr1<zbr2){
            kra=sre;
        }
        else {
            poc=sre;
        }
        sre=(poc+kra)/2;
    }
    int zbr1=0;
    int zbr2=0;
    int zbr3=0;
    for (int i=0;i<lis.size();i++){
        zbr1+=abs((sre-1)-lis[i].first)+abs((sre-1)-lis[i].second);
        zbr2+=abs((sre)-lis[i].first)+abs((sre)-lis[i].second);
        zbr3+=abs((sre+1)-lis[i].first)+abs((sre+1)-lis[i].second);
        
    }
  //  cout << isp << " " << sre << " " << zbr1 << " " << zbr2 << " " << zbr3 << "\n";
    cout << isp+min(zbr1,min(zbr2,zbr3))+lis.size() << "\n";
}

Compilation message (stderr)

bridge.cpp: In function 'int main()':
bridge.cpp:29:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |         for (int i=0;i<lis.size();i++){
      |                      ~^~~~~~~~~~~
bridge.cpp:47:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |     for (int i=0;i<lis.size();i++){
      |                  ~^~~~~~~~~~~

• Subtask 1: 0 / 8
• Subtask 2: 0 / 14
• Subtask 3: 0 / 9
• Subtask 4: 0 / 32
• Subtask 5: 0 / 37