hdu 2544 最短路

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额......最短路算法，从代码中去感悟吧，改变了下代码风格，不过感觉好别扭

#include<iostream>
#include<cstdio>
#include<algorithm>
#include<cmath>
#include<cstdlib>
#include<queue>
#include<map>
#include<stack>
#include<list>
#include<vector>
#include<cstring>
#define inf 1<<30
#define Inf -1<<30
#define  maxn 105
#define ll long long
#define uli unsigned long int
#define f_(i,x,n) for(int i=x;i<=n;i++)
#define F_(i,x,n) for(int i=x;i>=n;i--)
using namespace std;
int n,m;
vector<int>mapp[maxn];
int vaule[maxn][maxn];
void dijkstra()
{
	int visit[maxn],z[maxn];
	memset(visit,0,sizeof(visit));
	fill(z+1,z+n+1,inf);
	z[1]=0;
	while(!visit[n])
	{
		int v=-1;
		f_(i,1,n)
		{
			if(!visit[i]&&(v==-1||z[i]<z[v])) v=i;
		}
		visit[v]=1;
		f_(i,0,mapp[v].size()-1)
		{
			int x=mapp[v][i];
			z[x]=min(z[x],vaule[v][x]+z[v]);
		}
	} 
	cout<<z[n]<<endl;
}
int main()
{
	while(cin>>n>>m)
	{
		if(!n&&!m) break; 
		memset(vaule,0,sizeof(vaule));
		f_(i,1,n) mapp[i].clear(); 
		f_(i,1,m)
		{
			int x,y,z;
			cin>>x>>y>>z;
			mapp[x].push_back(y);
			mapp[y].push_back(x);
			vaule[x][y]=z;
			vaule[y][x]=z;
		}
		dijkstra();
	}
	return 0;
}

hdu 2544 最短路

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原文地址：http://blog.csdn.net/zafkiel_nightmare/article/details/46476245