Submission #958913

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
958913	2024-04-07 04:22:15	nguyentunglam	Longest Trip (IOI23_longesttrip)	C++17	100 / 100	14 ms	1116 KiB

longesttrip

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#include "longesttrip.h"
#ifdef ngu
#include "grader.cpp"
#endif // ngu
#include<bits/stdc++.h>
using namespace std;
pair<int, int> Find (vector<int> a, vector<int> b) {
  if (!are_connected(a, b)) return make_pair(-1, -1);
  int l = 0, r = a.size() - 1, lastx = -1, lasty = -1;
  while (l <= r) {
    int mid = l + r >> 1;
    vector<int> ask;
    for(int i = 0; i <= mid; i++) ask.push_back(a[i]);
    if (are_connected(ask, b)) {
      lastx = mid;
      r = mid - 1;
    } else l = mid + 1;
  }
  l = 0, r = b.size() - 1;
  while (l <= r) {
    int mid = l + r >> 1;
    vector<int> ask;
    for(int i = 0; i <= mid; i++) ask.push_back(b[i]);
    if (are_connected(ask, {a[lastx]})) {
      lasty = mid;
      r = mid - 1;
    } else l = mid + 1;
  }
  assert(are_connected({a[lastx]}, {b[lasty]}));
 
 
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Compilation message (stderr)

longesttrip.cpp: In function 'std::pair<int, int> Find(std::vector<int>, std::vector<int>)':
longesttrip.cpp:12:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   12 |     int mid = l + r >> 1;
      |               ~~^~~
longesttrip.cpp:22:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   22 |     int mid = l + r >> 1;
      |               ~~^~~
longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:120:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  120 |     for(int j = x + 1; j < a.size(); j++) ans.push_back(a[j]);
      |                        ~~^~~~~~~~~~
longesttrip.cpp:122:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  122 |     for(int j = y; j < b.size(); j++) ans.push_back(b[j]);
      |                    ~~^~~~~~~~~~

• Subtask 0: 0 / 0
• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 25 / 25
• Subtask 4: 60 / 60