Description
Input
Output
Sample Input
4 3 1 2 2 3 4 3
Sample Output
1 2 4 3
题目大意:中文。
#include<stdio.h> #include<string.h> int gra[505][505], degree[505]; int main() { int n, m; while (scanf("%d %d", &n, &m) == 2) { memset(gra, 0, sizeof(gra)); memset(degree, 0, sizeof(degree)); for (int i = 0; i < m; i++) { int a, b; scanf("%d %d", &a, &b); if (!gra[a][b]) { //判断重边 gra[a][b] = 1; degree[b]++; } } for (int i = 1; i <= n; i++) { //拓扑 for (int j = 1; j <= n; j++) { if (degree[j] == 0) {//寻找入度为零的点作为起点 degree[j]--; if (i != n) printf("%d ", j); else printf("%d\n", j); for (int k = 1; k <= n; k++) {//删除与该点相关联的边 if (gra[j][k]) { degree[k]--; } } break; } } } } return 0; }
原文地址:http://blog.csdn.net/llx523113241/article/details/43281855