Submission #1324574

#	Time	Username	Problem	Language	Result	Execution time	Memory
1324574		panhcutizz	Stranded Far From Home (BOI22_island)	C++17	Compilation error	0 ms	0 KiB

island

#include <iostream>
#include <vector>
#include <random>
#include <algorithm>
#include <chrono>
#include <queue>
#define all(x) x.begin(), x.end()
#define pb push_back
#define fi first
#define se second
#define compact(v) v.erase(unique(all(v)) , v.end())
#define pi pair<int , int>
#define vi vector<int>
#define eb emplace_back
#define FOR(i , l , r) for(int i = l; i <= r; ++ i)
#define FORD(i , l , r) for(int i = l; i >= r; -- i)
template <class T> bool maximize(T &a , T b){return (a < b ? a = b , true : false);}
template <class T> bool minimize(T &a , T b){return (a > b ? a = b , true : false);}

using namespace std;
typedef long long ll;
#define int long long

const int nd = 2e5 + 5 , mod = 1e9 + 7;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
uniform_int_distribution<int> dist(1 , (int)2e9);
int add(int a , int b){
    a += b;
    return (a >= mod ? a - mod : a);
}
int sub(int a , int b){
    a -= b;
    return (a < 0 ? a + mod : a);
}
int mul(ll a , ll b){return (a * b) % mod;}

int xpow(int a , int b){
    if(b == 1) return a;
    int x = xpow(a , b / 2);
    if(b & 1) return mul(a , mul(x , x));
    else return mul(x , x);
}
#include <set>
vi adj[nd];

struct node{
    int u , w;
    bool t;
    bool operator<(const node &o)const{
        if(o.w == w){
            if(t == o.t) return u < o.u;
            return t < o.t;
        }
        return w < o.w;
    }
};
set <node> event;

int par[nd] , sz[nd];

int get(int u){return u == par[u] ? u : par[u] = get(par[u]);}

void unite(int u , int v){
    u = get(u) , v = get(v);
    if(u == v) return;
    
    par[u] = v , sz[v] += sz[u];
    return;
}

bool ans[nd];
int pre[nd];

void solve(){
    int n , m;
    cin >> n >> m;

    int mx = 0;

    FOR(i , 1 , n){
        int v;
        cin >> v;
        maximize(mx , v);
        //cout << i << " " << v << '\n';
        event.insert({i , v , false});
        event.insert({i , v , true});

        par[i] = i , sz[i] = v;
        pre[i] = v;
    }

    FOR(i , 1 , m){
        int u , v;
        cin >> u >> v;
        adj[u].eb(v) , adj[v].eb(u);
    }

    for(auto [u , w , t] : event){
        //cout << u << " " << w << " " << t << '\n';
        if(!t){
            for(int v : adj[u]) if(sz[v] <= w){
                unite(u , v);
            }
            continue;
        }

        if(w >= mx) ans[u] = true;
        else{
            if(maximize(pre[u] , sz[get(u)])){
                event.insert({u , sz[get(u)] , true});
            }
        }
    }

    FOR(i , 1 , n) cout << ans[i];
}

signed main() {
   ios_base::sync_with_stdio(false);
   cin.tie(0);

    #define task "task" 
    if(fopen(task".inp", "r")) {
        freopen(task".inp", "r", stdin);
        freopen(task".out", "w", stdout);
    }
    solve();

    return 0;
}
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Compilation message (stderr)

In file included from /usr/include/c++/13/set:62,
                 from island.cpp:43:
/usr/include/c++/13/bits/stl_tree.h: In instantiation of 'struct std::_Rb_tree_const_iterator<node>':
/usr/include/c++/13/bits/stl_pair.h:193:11:   required from 'struct std::pair<std::_Rb_tree_const_iterator<node>, bool>'
island.cpp:85:21:   required from here
/usr/include/c++/13/bits/stl_tree.h:373:7: error: postfix 'std::_Rb_tree_const_iterator<_Tp>::_Self std::_Rb_tree_const_iterator<_Tp>::operator++(long long int) [with _Tp = node; _Self = std::_Rb_tree_const_iterator<node>::_Self]' must have 'int' as its argument
  373 |       operator++(int) _GLIBCXX_NOEXCEPT
      |       ^~~~~~~~
/usr/include/c++/13/bits/stl_tree.h:388:7: error: postfix 'std::_Rb_tree_const_iterator<_Tp>::_Self std::_Rb_tree_const_iterator<_Tp>::operator--(long long int) [with _Tp = node; _Self = std::_Rb_tree_const_iterator<node>::_Self]' must have 'int' as its argument
  388 |       operator--(int) _GLIBCXX_NOEXCEPT
      |       ^~~~~~~~
/usr/include/c++/13/bits/stl_tree.h: In instantiation of 'struct std::_Rb_tree_iterator<node>':
/usr/include/c++/13/bits/stl_pair.h:193:11:   required from 'struct std::pair<std::_Rb_tree_iterator<node>, bool>'
/usr/include/c++/13/bits/stl_set.h:522:48:   required from 'std::pair<typename std::_Rb_tree<_Key, _Key, std::_Identity<_Tp>, _Compare, typename __gnu_cxx::__alloc_traits<_Alloc>::rebind<_Key>::other>::const_iterator, bool> std::set<_Key, _Compare, _Alloc>::insert(value_type&&) [with _Key = node; _Compare = std::less<node>; _Alloc = std::allocator<node>; typename std::_Rb_tree<_Key, _Key, std::_Identity<_Tp>, _Compare, typename __gnu_cxx::__alloc_traits<_Alloc>::rebind<_Key>::other>::const_iterator = std::_Rb_tree<node, node, std::_Identity<node>, std::less<node>, std::allocator<node> >::const_iterator; typename __gnu_cxx::__alloc_traits<_Alloc>::rebind<_Key>::other = std::allocator<node>; typename __gnu_cxx::__alloc_traits<_Alloc>::rebind<_Key> = __gnu_cxx::__alloc_traits<std::allocator<node>, node>::rebind<node>; typename _Alloc::value_type = node; value_type = node]'
island.cpp:85:21:   required from here
/usr/include/c++/13/bits/stl_tree.h:292:7: error: postfix 'std::_Rb_tree_iterator<_Tp>::_Self std::_Rb_tree_iterator<_Tp>::operator++(long long int) [with _Tp = node; _Self = std::_Rb_tree_iterator<node>::_Self]' must have 'int' as its argument
  292 |       operator++(int) _GLIBCXX_NOEXCEPT
      |       ^~~~~~~~
/usr/include/c++/13/bits/stl_tree.h:307:7: error: postfix 'std::_Rb_tree_iterator<_Tp>::_Self std::_Rb_tree_iterator<_Tp>::operator--(long long int) [with _Tp = node; _Self = std::_Rb_tree_iterator<node>::_Self]' must have 'int' as its argument
  307 |       operator--(int) _GLIBCXX_NOEXCEPT
      |       ^~~~~~~~
island.cpp: In function 'int main()':
island.cpp:124:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  124 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
island.cpp:125:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  125 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~