Submission #414786

#	Time	Username	Problem	Language	Result	Execution time	Memory
414786		amoo_safar	City (JOI17_city)	C++17	Compilation error	0 ms	0 KiB

Encoder

#include "Encoder.h"
#include <bits/stdc++.h>

using namespace std;


const int N = 29e4;
const int bl = 125;
const int sd = 8585;

int mk[N];
mt19937 rng(sd);
vector<int> V;

vector<int> G[N];
int st[N], fn[N], T = 0;

void DFS(int u, int p){
	st[u] = T ++;
	shuffle(G[u].begin(), G[u].end(), rng);
	for(auto adj : G[u])
		if(adj != p)
			DFS(adj, u);
	fn[u] = T;
	while(mk[fn[u] - st[u] ] == -1){
		fn[u] ++;
		T ++;
	}
	// cerr << "!! " << u << ' ' << st[u] << ' ' << fn[u] << '\n'; 
}

void Encode(int _n, int A[], int B[]){
	memset(mk, -1, sizeof mk);
	int cnt = 0;

	for(int i = 1; i < N; i++){
		int pr = (i + bl - 1) / bl;
		// if(i > N / 2) pr += pr;
		uniform_int_distribution<> Amoo(1, pr);
		if(Amoo(rng) == 1){
			mk[i] = V.size();
			V.push_back(i);
		}
	}
	int sz = V.size();
	for(int i = 0; i < _n - 1; i++)
		G[A[i]].push_back(B[i]), G[B[i]].push_back(A[i]);
	T = 0;
	DFS(0, -1);
	cerr << "! " << V.size() << '\n';
	// for(int i = 0; i < _n; i++)
		// cerr << "! " << st[i] << ' ' << fn[i] << '\n';
	
	for(int i = 0; i < _n; i++){
		Code(i, 1ll * sz * st[i] + mk[fn[i] - st[i]]);
	}
}

Device

Compilation message (stderr)

Encoder.cpp: In function 'void Encode(int, int*, int*)':
Encoder.cpp:34:6: warning: unused variable 'cnt' [-Wunused-variable]
   34 |  int cnt = 0;
      |      ^~~

/usr/bin/ld: /tmp/ccbCOuQS.o: in function `main':
grader_device.cpp:(.text.startup+0xf8): undefined reference to `InitDevice()'
/usr/bin/ld: grader_device.cpp:(.text.startup+0x19b): undefined reference to `Answer(long long, long long)'
collect2: error: ld returned 1 exit status