bfs

1 #include
     
       2 #include
      
        3 #include
       
          4 using namespace std; 5 queue
        
         q; 6 int map[1001][1001]; 7 int vis[1001]; 8 int n,m; 9 void bfs(int p)10 {11     q.push(p);12     vis[p]=1;13     printf("%c-->",char(q.front()+64));14     while(q.size()!=0)15     {    16         int k=q.front();17         q.pop();18         for(int i=1;i<=n;i++)19         {20             21             if(vis[i]==0&&map[k][i]==1)22             {23                 printf("%c-->",char(i+64));24                 //q.pop();25                 q.push(i);26                 vis[i]=1;27             }28         }29     }30 }31 int main()32 {33     34     scanf("%d%d",&n,&m);35     for(int i=1;i<=m;i++)36     {37         char x,y;38         //scanf("\n%d %d",&x,&y);39         cin>>x>>y;40         x=x-64;41         y=y-64;42         map[x][y]=map[y][x]=1;43     }44     bfs(1);45     return 0;46 }
        
       
      
     

dfs

1 #include
     
       2 #include
      
        3 using namespace std; 4 int map[1001][1001]; 5 int vis[1001]; 6 int n,m; 7 void dfs(int p) 8 { 9     vis[p]=1;10     printf("%c --> ",char(p+64));11     for(int i=1;i<=n;i++)12     {13         if(vis[i]==0&&map[p][i]==1)14         {15         16             dfs(i);17         }18         //else19         //return ;20     }21 }22 int main()23 {24     25     scanf("%d%d",&n,&m);26     for(int i=1;i<=m;i++)27     {28         char x;29         char y;30         scanf("\n%c %c",&x,&y);31         //cin>>x>>y;32         x=x-64;33         y=y-64;34         map[x][y]=map[y][x]=1;35     }36     dfs(1);37     return 0;38 }