Submission #147297

#	Time	Username	Problem	Language	Result	Execution time	Memory
147297		liwi	Split the Attractions (IOI19_split)	C++14	0 / 100	4 ms	2680 KiB

split

#include "split.h"

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;
typedef tree<int, null_type, less<int>, rb_tree_tag,tree_order_statistics_node_update> ordered_set;

#define scan(x) do{while((x=getchar())<'0'); for(x-='0'; '0'<=(_=getchar()); x=(x<<3)+(x<<1)+_-'0');}while(0)
char _;
#define complete_unique(a) a.erase(unique(a.begin(),a.end()),a.end())
#define all(a) a.begin(),a.end()
#define println printf("\n");
#define readln(x) getline(cin,x);
#define pb push_back
#define endl "\n"
#define INT_INF 0x3f3f3f3f
#define LL_INF 0x3f3f3f3f3f3f3f3f
#define MOD 1000000007
#define MOD2 1190492669
#define SEED 131
#define mp make_pair
#define fastio cin.tie(0); cin.sync_with_stdio(0);

#define MAXN 100005

typedef unsigned long long ull;
typedef long long ll;
typedef long double ld;
typedef unordered_map<int,int> umii;
typedef pair<int,int> pii;
typedef pair<double,double> pdd;
typedef pair<ll,ll> pll;
typedef pair<int,pii> triple;
typedef int8_t byte;

mt19937 g1(time(0));

int randint(int a, int b){return uniform_int_distribution<int>(a, b)(g1);}
ll randlong(ll a,ll b){return uniform_int_distribution<long long>(a, b)(g1);}

ll gcd(ll a, ll b){return b == 0 ? a : gcd(b, a % b);}
ll lcm(ll a, ll b){return a*b/gcd(a,b);}
ll fpow(ll  b, ll exp, ll mod){if(exp == 0) return 1;ll t = fpow(b,exp/2,mod);if(exp&1) return t*t%mod*b%mod;return t*t%mod;}
ll divmod(ll i, ll j, ll mod){i%=mod,j%=mod;return i*fpow(j,mod-2,mod)%mod;}

int num_nodes,sz[MAXN];
bool vis[MAXN];
vector<int> connections[MAXN],res;

vector<int> subtaskTwo(int wanted_sz){
	queue<int> q;
	q.push(0);
	vis[0] = true;
	wanted_sz--;
	while(q.size()){
		int node = q.front(); q.pop();
		for(int check:connections[node]){
			if(vis[check] || !wanted_sz) continue;
			vis[check] = true;
			wanted_sz--;
			q.push(check);
		}
	}
	vector<int> v;
	for(int i=0; i<num_nodes; i++)
		if(vis[i])
			v.pb(i);
	return v;
}

vector<int> find_split(int n, int a, int b, int c, vector<int>p, vector<int>q){
	num_nodes = n, res.resize(n);
	for(int i=0; i<p.size(); i++){
		int f = p[i], s = q[i];
		connections[f].pb(s);
		connections[s].pb(f);
	}
	if(a == 1){
		vector<int> v = subtaskTwo(min(b,c));
		for(int check:v)
			res[check] = (b<c?2:3);
		bool done_one = false;
		for(int i=0; i<num_nodes; i++){
			if(vis[i]) continue;
			if(!done_one) res[i] = 1, done_one = true;
			else res[i] = 3;
		}
		return res;
	}
	return {};
}

Compilation message (stderr)

split.cpp: In function 'std::vector<int> find_split(int, int, int, int, std::vector<int>, std::vector<int>)':
split.cpp:76:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0; i<p.size(); i++){
               ~^~~~~~~~~

• Subtask 1: 0 / 7
• Subtask 2: 0 / 11
• Subtask 3: 0 / 22
• Subtask 4: 0 / 24
• Subtask 5: 0 / 36