Submission #825775

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
825775	2023-08-15 07:55:01	top34051	Thousands Islands (IOI22_islands)	C++17	0 / 100	4 ms	5120 KiB

islands

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#include "islands.h"
#include <variant>
#include <vector>
const int maxn = 1e5 + 5;
std::vector<std::pair<int, std::pair<int, int>>> way[maxn];
std::vector<int> path, ans;
int goal;
bool subtask3_completed, vis[maxn];
void subtask3(int u, int last) {
  vis[u] = true;
  if (u == goal) {
    std::vector<int> has;
    for (auto &[v, idx] : way[u]) {
      int i = idx.first, j = idx.second;
      if (i == last || j == last) continue;
      has.push_back(i);
      has.push_back(j);
      if ((int)has.size() == 4) break;
    }
    ans = path;
    ans.push_back(has[0]);
    ans.push_back(has[1]);
    ans.push_back(has[2]);
    ans.push_back(has[3]);
    ans.push_back(has[1]);
    ans.push_back(has[0]);
 
 
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Compilation message (stderr)

islands.cpp: In function 'void subtask3(int, int)':
islands.cpp:39:24: warning: unused variable 'j' [-Wunused-variable]
   39 |     int i = idx.first, j = idx.second;
      |                        ^
islands.cpp: In function 'std::variant<bool, std::vector<int, std::allocator<int> > > find_journey(int, int, std::vector<int>, std::vector<int>)':
islands.cpp:54:21: warning: unused variable 'v' [-Wunused-variable]
   54 |       int u = U[i], v = V[i];
      |                     ^

• Subtask 1: 0 / 5
• Subtask 2: 0 / 5
• Subtask 3: 0 / 21
• Subtask 4: 0 / 24
• Subtask 5: 0 / 45