输入：n，m代表顶点数目和边数。然后m行，代表每个边的起点和终点。0 0 表示结束。
输出：第一行为n个正整数，表示每个点的出度；第二行为n个正整数，表示每个点的入度。
1 #include <iostream> 2 #include <cstdio> 3 #include <cstdlib> 4 #include <cstring> 5 #include <cctype> 6 #include <stack> 7 #include <queue> 8 #include <map> 9 #include <set> 10 #include <vector> 11 #include <cmath> 12 #include <algorithm> 13 #define lson l, m, rt<<1 14 #define rson m+1, r, rt<<1|1 15 using namespace std; 16 typedef long long int LL; 17 const int MAXN = 0x3f3f3f3f; 18 const int MIN = -0x3f3f3f3f; 19 const double eps = 1e-9; 20 const int dir[8][2] = {{0,1},{1,0},{0,-1},{-1,0},{-1,1}, 21 {1,1},{1,-1},{-1,-1}}; 22 const int MAX = 100; 23 struct ArcNode{ // 边节点 24 int adjvex; ArcNode *nextarc; 25 }; 26 struct VNode{ // 顶点 27 int data; 28 ArcNode *head1; // 出边表表头指针 29 ArcNode *head2; // 入边表表头指针 30 }; 31 struct LGraph{ // 临界表结构体 32 VNode vertexs[MAX]; // 顶点数组 33 int vexnum, arcnum; 34 }; 35 LGraph lg; 36 void CreateLG() 37 { 38 int i = 0; ArcNode *pi; int v1, v2; 39 //scanf("%d%d", &lg.vexnum, &lg.arcnum); 40 for (i = 0; i < lg.vexnum; ++i) lg.vertexs[i].head1 = lg.vertexs[i].head2 = NULL; 41 for (i = 0; i < lg.arcnum; ++i){ 42 scanf("%d%d", &v1, &v2); v1--; v2--; 43 pi = new ArcNode; pi->adjvex = v2; pi->nextarc = lg.vertexs[v1].head1; 44 lg.vertexs[v1].head1 = pi; 45 pi = new ArcNode; pi->adjvex = v1; pi->nextarc = lg.vertexs[v2].head2; 46 lg.vertexs[v2].head2 = pi; 47 } 48 } 49 void DeleteLG() 50 { 51 ArcNode *pi; int i; 52 for (i = 0; i < lg.vexnum; ++i){ 53 pi = lg.vertexs[i].head1; 54 while (pi){ 55 lg.vertexs[i].head1 = pi->nextarc; 56 delete pi; 57 pi = lg.vertexs[i].head1; 58 } 59 pi = lg.vertexs[i].head2; 60 while (pi){ 61 lg.vertexs[i].head2 = pi->nextarc; 62 delete pi; 63 pi = lg.vertexs[i].head2; 64 } 65 } 66 } 67 68 int main(void){ 69 #ifndef ONLINE_JUDGE 70 freopen("neighlist.in", "r", stdin); 71 #endif 72 int i, id, od; ArcNode *pi; 73 while (1){ 74 int n, m; scanf("%d%d", &n, &m); 75 if (n+m == 0) break; 76 lg.vexnum = n; lg.arcnum = m; CreateLG(); 77 for (i = 0; i < lg.vexnum; ++i){ 78 od = 0; 79 pi = lg.vertexs[i].head1; 80 while (pi){ 81 od++; pi = pi->nextarc; 82 } 83 if (i == 0) printf("%d", od); 84 else printf(" %d", od); 85 } 86 printf("\n"); 87 for (i = 0; i < lg.vexnum; ++i){ 88 id = 0; pi = lg.vertexs[i].head2; 89 while (pi){ 90 id++; pi = pi->nextarc; 91 } 92 if (i == 0) printf("%d", id); 93 else printf(" %d", id); 94 } 95 printf("\n"); 96 } 97 98 return 0; 99 }
也不觉得难写了……