Submission #1135088

#	Time	Username	Problem	Language	Result	Execution time	Memory
1135088		Lemser	Thousands Islands (IOI22_islands)	C++20	Compilation error	0 ms	0 KiB

islands

#include "islands.h"
#include <bits/stdc++.h>
using namespace std;

using ll = long long;
using ull = unsigned long long;
using lld = long double;
using ii = pair<int,int>;
using pll = pair<ll, ll>;

using vi = vector<int>;
using vll = vector<ll>;
using vii = vector<ii>;
using vpll = vector<pll>;
using vlld = vector<lld>;

// #define endl '\n'
#define all(x) x.begin(),x.end()
#define lsb(x) x&(-x)
#define gcd(a,b) __gcd(a,b)
#define sz(x) (int)x.size()
#define mp make_pair
#define pb push_back
#define fi first
#define se second
#define fls cout.flush()

#define fore(i,l,r) for(auto i=l;i<r;i++)
#define fo(i,n) fore(i,0,n)
#define forex(i,r,l) for(auto i=r; i>=l;i--)
#define ffo(i,n) forex(i,n-1,0)

bool cmin(ll &a, ll b) { if(b<a){a=b;return 1;}return 0; }
bool cmax(ll &a, ll b) { if(b>a){a=b;return 1;}return 0; }
void valid(ll in) { cout<<((in)?"Yes\n":"No\n"); }
ll lcm(ll a, ll b) { return (a/gcd(a,b))*b; }
ll gauss(ll n) { return (n*(n+1))/2; }

variant<bool, vector<int>> find_journey(
    int n, int m, vector<int> u, vector<int> v) {
  if (n > 2) return false;
  vll ok[2];
  fo (i, m) ok[u[i]].pb(i);
  if (sz(ok[0]) < 2 || sz(ok[1]) < 1) return false;
  vll r;
  r.pb(ok[0][0]);
  r.pb(ok[1][0]);
  r.pb(ok[0][1]);
  r.pb(ok[0][0]);
  r.pb(ok[1][0]);
  r.pb(ok[0][1]);
  return r;
}

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:52:10: error: could not convert 'r' from 'vll' {aka 'std::vector<long long int>'} to 'std::variant<bool, std::vector<int, std::allocator<int> > >'
   52 |   return r;
      |          ^
      |          |
      |          vll {aka std::vector<long long int>}