参考代码:
import java.util.*; public class Main { public static void main(String[] args) { Scanner cin = new Scanner(System.in); int n = cin.nextInt(); int[][] d = new int[n][n]; for(int i = 0; i < n; i++) { for(int j = 0; j < n; j++) { int z = cin.nextInt(); if(i != j && z != 0) d[i][j] = z; else d[i][j] = (int) 1e9; } } for(int k = 0; k < n; k++) { for(int i = 0; i < n; i++) { for(int j = 0; j < n; j++) { d[i][j] = Math.min(d[i][j], d[i][k] + d[k][j]); } } } for(int i = 0; i < n; i++) { for(int j = 0; j < n; j++) { if(i == j) { System.out.print(0 + " "); } else { int ans = d[i][j] == (int) 1e9 ? -1 : d[i][j]; System.out.print(ans + " "); } } System.out.println(); } } }
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