제출 #385137

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
385137		AmineWeslati	Rail (IOI14_rail)	C++14	30 / 100	120 ms	34540 KiB

rail

//Never stop trying
#include "bits/stdc++.h"
using namespace std;
#define boost ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)

typedef long long ll;
typedef string str;
typedef long double ld;
typedef pair<int, int> pi;
#define fi first
#define se second
typedef vector<int> vi;
typedef vector<pi> vpi;
#define pb push_back
#define eb emplace_back
#define sz(x) (int)x.size()
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
#define endl "\n"
#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i)

const int MOD = 1e9 + 7; //998244353
const ll INF = 1e9;
const int MX = 5000 + 10;
const int nx[4] = {0, 0, 1, -1}, ny[4] = {1, -1, 0, 0}; //right left down up

template<class T> using V = vector<T>;
template<class T> bool ckmin(T& a, const T& b) { return a > b ? a = b, 1 : 0; }
template<class T> bool ckmax(T& a, const T& b) { return a < b ? a = b, 1 : 0; }
ll cdiv(ll a, ll b) { return a / b + ((a ^ b) > 0 && a % b); } // divide a by b rounded up
//constexpr int log2(int x) { return 31 - __builtin_clz(x); } // floor(log2(x))

mt19937 rng(chrono::system_clock::now().time_since_epoch().count());
//mt19937_64 rng(chrono::system_clock::now().time_since_epoch().count());
ll random(ll a, ll b){
    return a + rng() % (b - a + 1);
}
#ifndef LOCAL  
#define cerr if(false) cerr
#endif
#define dbg(x) cerr << #x << " : " << x << endl; 
#define dbgs(x,y) cerr << #x << " : " << x << " / " << #y << " : " << y << endl;
#define dbgv(v) cerr << #v << " : " << "[ "; for(auto it : v) cerr << it << ' '; cerr << ']' << endl;
#define here() cerr << "here" << endl;

void IO() {
#ifdef LOCAL
    freopen("input.txt", "r", stdin); 
    freopen("output.txt", "w", stdout);
#endif
}
/////////////////////////ONLY CLEAN CODES ALLOWED/////////////////////////

#ifndef LOCAL
#include "rail.h"
#endif

#ifdef LOCAL
int getDistance(int u, int v){
	return 0;
}
#endif

struct st{
	int idx,x; 
};


int N,d[MX][MX];
st L,R; 
V<st>tyC,tyD;

void get(int i, int j){
	d[i][j]=d[j][i]=getDistance(i,j);
}

void findLocation(int N, int first, int X[], int ty[]){
	::N=N; 
	if(N==1){
		X[0]=first; 
		ty[0]=1;
		return;
	}


	d[0][0]=0;
	vpi vec;
	FOR(i,1,N){
		get(0,i);
		vec.eb(d[0][i],i);
	}
	sort(all(vec));

	tyC.pb({0,first});
	L=tyC[0];
	X[0]=L.x;
	ty[0]=1;

	tyD.pb({vec[0].se,first+vec[0].fi});
	R=tyD[0];
	X[R.idx]=R.x;
	ty[R.idx]=2;


	int fir=1;
	for(auto it: vec){
		if(fir){
			fir=0;
			continue;
		}

		st k; k.idx=it.se;
		get(k.idx,L.idx);
		get(k.idx,R.idx);

		//Case 1
		k.x=L.x+d[k.idx][L.idx];
		int f=0;
		for(st p: tyC){
			if(p.x<k.x){
				f|=(k.x-p.x+R.x-p.x==d[k.idx][R.idx]);
			}
		}
		if(f){
			X[k.idx]=k.x; 
			ty[k.idx]=2;
			tyD.pb(k);
			if(k.x>R.idx) R=k; 
			continue;
		}


		//Case 2
		k.x=R.x-d[k.idx][R.idx];
		for(st p: tyD){
			if(p.x>k.x){
				f|=(p.x-k.x+p.x-L.x==d[k.idx][L.idx]);
			}
		}
		//assert(f);

		X[k.idx]=k.x; 
		ty[k.idx]=1;
		tyC.pb(k);
		if(k.x<L.idx) L=k; 
	}
}


#ifdef LOCAL
int main(){
	IO();

}
#endif

//Change your approach 

• Subtask 1: 8 / 8
• Subtask 2: 22 / 22
• Subtask 3: 0 / 26
• Subtask 4: 0 / 44