Submission #1177332

#	Time	Username	Problem	Language	Result	Execution time	Memory
1177332		ElayV13	Palembang Bridges (APIO15_bridge)	C++20	9 / 100	2092 ms	656 KiB

bridge

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define ld long double
#define FOR(a , b) for(int i = a;i <= b;i++)
#define pb push_back
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const int MXN = 100005;
const int INF = 1e18;
const int mod = 1e9 + 7;

int k , n , s[MXN] , t[MXN];
char p[MXN] , q[MXN];

int calc(int pa , int pb)
{
        int res = 0;
        for(int i = 1;i <= n;i++)
        {
                if(p[i] == q[i])
                {
                        res += (abs(s[i] - t[i]));
                        continue;
                }
                ++res;
                res += min((abs(s[i] - pa)) + (abs(t[i] - pa)) , (abs(s[i] - pb)) + (abs(t[i] - pb)));
        }
        return res;
}

signed main(){
      ios_base::sync_with_stdio(0);
      cin.tie(0);cout.tie(0);
      cin >> k >> n;
      vector < int > pos; map < int , int > used;
      for(int i = 1;i <= n;i++)
      {
              cin >> p[i] >> s[i] >> q[i] >> t[i];
              if(!used[s[i]]){
                        pos.push_back(s[i]);
                        used[s[i]] = 1;
              }
              if(!used[t[i]]){
                        pos.push_back(t[i]);
                        used[t[i]] = 1;
              }
      }
      int res = INF;
      for(int i = 0;i < pos.size();i++)
      {
              int x = pos[i];
              vector < int > l , r;
              for(int j = i - 1;j >= 0;j--)
              {
                      l.push_back(calc(pos[j] , x));
              }
              for(int j = i + 1;j < pos.size();j++)
              {
                      r.push_back(calc(pos[j] , x));
              }
              ///////////////////////////////////////////////
              if(l.size() == 1){
                      res = min(res , l[0]);
              }
              else if(l.size() > 1){
                      if(l[0] < l[1]){
                              res = min(res , l[0]);
                      }
                      else{
                              for(int j = 0;j < l.size() - 1;j++)
                              {
                                      if(l[j] > l[j + 1]){
                                                res = min(res , l[j + 1]);
                                      }
                              }
                      }
              }
              //////////////////////////////////////////////
              if(r.size() == 1){
                      res = min(res , r[0]);
              }
              else if(r.size() > 1){
                        if(r[0] < r[1]){
                                res = min(res , r[0]);
                        }
                        else{
                                for(int j = 0;j < r.size() - 1;j++)
                                {
                                        if(r[j] > r[j + 1]){
                                                res = min(res , r[j + 1]);
                                        }
                                }
                        }
              }
      }
      cout << res << endl;
}

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