古老的四种图存储方式

#include <iostream>

#include <cstdio>

#include <cstring>

#include <cstdlib>

#include <cmath>

using namespace std;

int graph[100][100];

int n,m;

int x,y,w;

int main()

{

    scanf("%d%d",&n,&m);

    for(int i = 1;i <= n;i ++)

      for(int j = 1;j <= n;j ++)

      {

          if(i == j)

             graph[i][j] = 0;

          else

             graph[i][j] = 1000000;

      }

    while(m --)

    {

        scanf("%d%d%d",&x,&y,&w);

        graph[x][y] = w;

    }

    for(int i = 1;i <= n;i ++)

       for(int j = 1;j <= n;j ++)

          if(graph[i][j] != 0 && graph[i][j] != 1000000)

             printf("%d -> %d have %d longth ",i,j,graph[i][j]);

#include <iostream>

#include <cstdio>

#include <cstring>

#include <cstdlib>

#include <cmath>

#include <algorithm>

using namespace std;

struct Node

{

    int from;

    int to;

    int w;

};

Node edge[10000];

int head[10000];

int n,m;

int x,y,w;

bool cmp(Node a,Node b)

{

    if(a.from == b.from && a.to == b.to)

        return a.w < b.w;

    if(a.from == b.from)

        return a.to < b.to;

    return a.from < b.from;

}

int main()

{

    scanf("%d%d",&n,&m);

    for(int i = 1;i <= m;i ++)

    {

        scanf("%d%d%d",&edge[i].from,&edge[i].to,&edge[i].w);

    }

    sort(edge + 1,edge + m,cmp);

    memset(head,-1,sizeof(head));

    head[edge[0].from] = 0;

    for(int i = 1;i < m;i ++)

    if(edge[i].from != edge[i - 1].from)

        head[edge[i].from] = i;

    for(int i = 1;i <= n;i ++)

    {

       for(int k = head[i];edge[k].from == i && k < m;k ++)

           printf("%d -> %d %d ",edge[k].from,edge[k].to,edge[k].w);

    }

}}

#include <iostream>

#include <cstdio>

#include <cstring>

#include <cstdlib>

#include <cmath>

#include <algorithm>

using namespace std;

struct EdgeNode

{

    int to;

    int w;

    EdgeNode * next;

};

struct VNode

{

    int from;

    EdgeNode * first;

};

VNode Adjlist[1000];

int n,m;

int x,y,w;

int main()

{

    scanf("%d%d%d",&n,&m);

    while(m --)

    {

        scanf("%d%d%d",&x,&y,&w);

        EdgeNode *p = new EdgeNode();

        p -> to = y;

        p -> w = w;

        p -> next = Adjlist[x].first;

        Adjlist[x].first = p;

    }

    for(int i = 1;i <= n;i ++)

    {

        for(EdgeNode * k;k != NULL;k = k -> next)

        printf("%d %d have %d ",i,k -> to,k -> w);

    }

#include <iostream>

#include <cstdio>

#include <cstring>

#include <cstdlib>

#include <cmath>

#include <algorithm>

using namespace std;

int head[10000];

struct EdgeNode

{

    int to;

    int w;

    int next;

};

EdgeNode Edges[10000];

int n,m;

int x,y,w;

int main()

{

    scanf("%d%d",&n,&m);

    memset(head,-1,sizeof(head));

    for(int k = 1;k <= m;k ++)

    {

        scanf("%d%d%d",&x,&y,&w);

        Edges[k].to = y;

        Edges[k].w = w;

        Edges[k].next = head[x];

        head[x] = k;

    }

    for(int i = 1;i <= n;i ++)

      for(int k = head[i];k != -1;k = Edges[k].next)

          printf("%d %d have %d ",i,Edges[k].to,Edges[k].w);

}}