Submission #150917

#	Time	Username	Problem	Language	Result	Execution time	Memory
150917		cheetose	Senior Postmen (BOI14_postmen)	C++11	100 / 100	293 ms	34040 KiB

postmen

#include<cstdio>
#include<cstdlib>
#include<iostream>
#include<vector>
#include<queue>
#include<bitset>
#include<string>
#include<stack>
#include<set>
#include<unordered_set>
#include<map>
#include<unordered_map>
#include<cstring>
#include<complex>
#include<cmath>
#include<iomanip>
#include<numeric>
#include<algorithm>
#include<list>
#include<functional>
#include<cassert>
#define mp make_pair
#define pb push_back
#define X first
#define Y second
#define y0 y12
#define y1 y22
#define INF 987654321
#define PI 3.141592653589793238462643383279502884
#define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
#define fdn(i,a,b,c) for(int (i)=(a);(i)>=(b);(i)-=(c))
#define MEM0(a) memset((a),0,sizeof(a));
#define MEM_1(a) memset((a),-1,sizeof(a));
#define ALL(a) a.begin(),a.end()
#define SYNC ios_base::sync_with_stdio(false);cin.tie(0)
using namespace std;
typedef long long ll;
typedef long double ld;
typedef double db;
typedef unsigned int uint;
typedef unsigned long long ull;
typedef pair<int, int> Pi;
typedef pair<ll, ll> Pll;
typedef pair<ld, ld> Pd;
typedef vector<int> Vi;
typedef vector<ll> Vll;
typedef vector<double> Vd;
typedef vector<Pi> VPi;
typedef vector<Pll> VPll;
typedef vector<Pd> VPd;
typedef tuple<int, int, int> iii;
typedef tuple<int,int,int,int> iiii;
typedef tuple<ll, ll, ll> LLL;
typedef vector<iii> Viii;
typedef vector<LLL> VLLL;
typedef complex<double> base;
const ll MOD = 1000000007;
ll POW(ll a, ll b, ll MMM = MOD) {ll ret=1; for(;b;b>>=1,a=(a*a)%MMM)if(b&1)ret=(ret*a)% MMM; return ret; }
ll gcd(ll a, ll b) { return b ? gcd(b, a%b) : a; }
ll lcm(ll a, ll b) { if (a == 0 || b == 0)return a + b; return a*(b / gcd(a, b)); }
int dx[] = { 0,1,0,-1,1,1,-1,-1 }, dy[] = { 1,0,-1,0,1,-1,1,-1 };

int RI() {
	bool minus = false;
	int result = 0;
	char ch;
	ch = getchar();
	while (true) {
		if (ch == '-') break;
		if (ch >= '0' && ch <= '9') break;
		ch = getchar();
	}
	if (ch == '-') minus = true; else result = ch-'0';
	while (true) {
		ch = getchar();
		if (ch < '0' || ch > '9') break;
		result = result*10 + (ch - '0');
	}
	if (minus)
		return -result;
	else
		return result;
}
int now[500005];
bool chk[500005],instack[500005];
int st[500005],T;
int c, to[1000005], pre[1000005], last[1000005], junk[1000005];
void addedge(int a,int b)
{
	to[c] = b; pre[c] = last[a]; last[a] = c++;
	to[c] = a; pre[c] = last[b]; last[b] = c++;	
}
void dfs(int N)
{
	while (last[N]!=-1) 
	{
		int next=last[N];
		last[N]=pre[next];
		if (!chk[next>>1]) {
			chk[next>>1]=1;
			dfs(to[next]);
		}
	}
	if(instack[N])
	{
		while(T)
		{
			int t=st[T];
			printf("%d",t);
			if(t==N)puts("");
			else putchar(' ');
			instack[t]=0;
			T--;
			if(t==N)break;
		}
	}
	st[++T]=N;
	instack[N]=1;
}
int main() {
	MEM_1(last);
	int n=RI(),m=RI();
	fup(i,0,m-1,1)
	{
		int x=RI(),y=RI();
		addedge(x,y);
	}
	dfs(1);
}

Compilation message (stderr)

postmen.cpp: In function 'int main()':
postmen.cpp:122:6: warning: unused variable 'n' [-Wunused-variable]
  int n=RI(),m=RI();
      ^

• Subtask 1: 38 / 38
• Subtask 2: 17 / 17
• Subtask 3: 45 / 45