Submission #135151

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
135151	2019-07-23 17:05:27	IOrtroiii	Highway Tolls (IOI18_highway)	C++14	100 / 100	353 ms	10988 KiB

highway

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#include "highway.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
void find_pair(int n, vector<int> u, vector<int> v, int a, int b) {
   int m = u.size();
   vector<vector<pair<int, int>>> g(n);
   for (int i = 0; i < m; ++i) {
      g[u[i]].emplace_back(v[i], i);
      g[v[i]].emplace_back(u[i], i);
   }
   vector<int> w(m);
   ll dist = ask(w);
   int l = 0, r = m - 1;
   while (l < r) {
      int md = (l + r) >> 1;
      for (int i = 0; i < m; ++i) {
         w[i] = i <= md;
      }
      if (ask(w) != dist) {
         r = md;
      } else {
         l = md + 1;
      }
   }
   int id = l;
 
 
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Compilation message (stderr)

In file included from /usr/include/c++/7/cassert:44:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:33,
                 from highway.cpp:3:
highway.cpp: In function 'void find_pair(int, std::vector<int>, std::vector<int>, int, int)':
highway.cpp:61:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    assert(tr.size() == n - 1);
           ~~~~~~~~~~^~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 7 / 7
• Subtask 3: 6 / 6
• Subtask 4: 33 / 33
• Subtask 5: 18 / 18
• Subtask 6: 31 / 31