Submission #1135122

#	Time	Username	Problem	Language	Result	Execution time	Memory
1135122		Saul0906	Thousands Islands (IOI22_islands)	C++20	Compilation error	0 ms	0 KiB

islands

#include "islands.h"
#include <bits/stdc++.h>
#define rep(a,b,c) for(ll a=b; a<c; a++)
#define repr(a,b,c) for(ll a=b-1; a>c-1; a--)
#define repa(a,b) for(auto a:b)
#define ll long long
#define pll pair<ll, ll>
#define pii pair<int, int>
#define fi first
#define se second
#define pb push_back
#define mid ((l+r)>>1)
#define ppb pop_back()

using namespace std;
using vi = vector<int>;
template<typename T>
using vec = vector<T>;

const int N=2e5+5;
vec<pii> adj[N];
bool vis[N];

bool solve(int u, int p){
	vis[u]=true;
	if(adj[u].size()>=6) return true;
	repa(v,adj[u]) if(!vis[v.fi]) if(solve(v.fi,u)) return true;
	return false;
}

std::variant<bool, std::vector<int>> find_journey(
	int N, int M, std::vector<int> U, std::vector<int> V) {
	vi a, b, ans;
	if(N==2){
		rep(i,0,M){
			if(U[i]==0) a.pb(i);
			else b.pb(i);
		}
		if(a.size()<2 || b.size()<1) return false;
		ans={a[0],b[0],a[1],a[0],b[0],a[1]};
		return ans;
	}
	rep(i,0,N) adj[i].clear();
	rep(i,0,M) adj[U[i]].pb({V[i],i});
	rep(i,0,M) adj[V[i]].pb({U[i],i});
	if(N<=2) return false;
	int c[4]={-1,-1,-1,-1};
	rep(i,0,M){
		if(U[i]==0 && V[i]==1) c[0]=(i);
		if(U[i]==1 && V[i]==0) c[1]=(i);
		if(U[i]==0 && V[i]==2) c[2]=(i);
		if(U[i]==2 && V[i]==0) c[3]=(i);
	}
	ans={c[0],c[1],c[2],c[3],c[1],c[0],c[3],c[2]};
	if(min(c[0],c[1],c[2],c[3])!=-1)return ans;
	if(adj[0].size()>=4) return true;
	if(solve(0,-1)) return true;
	return false;
}

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:55:15: error: no matching function for call to 'min(int&, int&, int&, int&)'
   55 |         if(min(c[0],c[1],c[2],c[3])!=-1)return ans;
      |            ~~~^~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/11/vector:60,
                 from islands.h:2,
                 from islands.cpp:1:
/usr/include/c++/11/bits/stl_algobase.h:230:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::min(const _Tp&, const _Tp&)'
  230 |     min(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/11/bits/stl_algobase.h:230:5: note:   template argument deduction/substitution failed:
islands.cpp:55:15: note:   candidate expects 2 arguments, 4 provided
   55 |         if(min(c[0],c[1],c[2],c[3])!=-1)return ans;
      |            ~~~^~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/11/vector:60,
                 from islands.h:2,
                 from islands.cpp:1:
/usr/include/c++/11/bits/stl_algobase.h:278:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::min(const _Tp&, const _Tp&, _Compare)'
  278 |     min(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/11/bits/stl_algobase.h:278:5: note:   template argument deduction/substitution failed:
islands.cpp:55:15: note:   candidate expects 3 arguments, 4 provided
   55 |         if(min(c[0],c[1],c[2],c[3])!=-1)return ans;
      |            ~~~^~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/11/vector:62,
                 from islands.h:2,
                 from islands.cpp:1:
/usr/include/c++/11/bits/stl_algo.h:3449:5: note: candidate: 'template<class _Tp> constexpr _Tp std::min(std::initializer_list<_Tp>)'
 3449 |     min(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/11/bits/stl_algo.h:3449:5: note:   template argument deduction/substitution failed:
islands.cpp:55:15: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   55 |         if(min(c[0],c[1],c[2],c[3])!=-1)return ans;
      |            ~~~^~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/11/vector:62,
                 from islands.h:2,
                 from islands.cpp:1:
/usr/include/c++/11/bits/stl_algo.h:3455:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::min(std::initializer_list<_Tp>, _Compare)'
 3455 |     min(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/11/bits/stl_algo.h:3455:5: note:   template argument deduction/substitution failed:
islands.cpp:55:15: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   55 |         if(min(c[0],c[1],c[2],c[3])!=-1)return ans;
      |            ~~~^~~~~~~~~~~~~~~~~~~~~