POJ 2230 解题报告

#include <iostream>
#include <cstdio>
using namespace std;
struct node {
	int v, ne;
} edge[100009];
int head[10009], vis[100009], cnt = 1;
int n, m, x, y;
void addedge (int u, int v) {
	edge[++cnt].v = v;
	edge[cnt].ne = head[u];
	head[u] = cnt;
}
void EulerianP (int x) {
	for (int i = head[x]; i != 0; i = edge[i].ne) {
		if (!vis[i]) {
			vis[i] = 1;
			EulerianP (edge[i].v);
		}
	}
	printf ("%d\n", x);
}
int main()
{
	scanf ("%d %d", &n, &m);
	for (int i = 1; i <= m; i++) {
		scanf ("%d %d", &x, &y);
		addedge (x, y);
		addedge (y, x);
	}
	EulerianP (1);
	return 0;
}