Submission #628141

#	Time	Username	Problem	Language	Result	Execution time	Memory
628141		Turkhuu	Thousands Islands (IOI22_islands)	C++17	Compilation error	0 ms	0 KiB

islands

#include "islands.h"
#include <bits/stdc++.h>
using namespace std;
variant<bool, vector<int>> find_journey(int N, int M, vector<int> U, vector<int> V) {
  if (N == 2) {
    return false;
  }
  vector<int> A(N), B(N);
  for (int i = 0; i < M; i++) {
    if ((U[i] + 1) % N == V[i]) {
      A[U[i]] = i;
    }
    if (V[i] + 1) % N == U[i]) {
      B[U[i]] = i;
    }
  }
  vector<int> ans;
  for (int i = 0; i < N; i++) {
    ans.push_back(A[i]);
  }
  for (int i = N - 1; i >= 0; i--) {
    ans.push_back(B[(i + 1) % N]);
  }
  for (int i = N - 1; i >= 0; i--) {
    ans.push_back(A[i]);
  }
  for (int i = 0; i < N; i++) {
    ans.push_back(B[(i + 1) % N]);
  }
  return ans;
}

Compilation message (stderr)

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:13:19: error: expected primary-expression before '%' token
   13 |     if (V[i] + 1) % N == U[i]) {
      |                   ^