第四题一直45%,有没有老哥帮忙看下哪里有问题,感觉就是裸的floyd啊
public class Solution { public static void main(String[] args) { Scanner in = new Scanner(System.in); int n = in.nextInt(); int m = in.nextInt(); int x = in.nextInt(); int y = in.nextInt(); int[] waitTime = new int[n + 1]; int[][] dis1 = new int[n + 1][n + 1]; int[][] dis2 = new int[n + 1][n + 1]; for (int i = 0; i <= n; i++) { Arrays.fill(dis1[i], -1); Arrays.fill(dis2[i], -1); } for (int i = 0; i < m; i++) { int u = in.nextInt(); int v = in.nextInt(); int w1 = in.nextInt(); int w2 = in.nextInt(); dis2[u][v] = dis2[v][u] = w1; dis1[u][v] = dis1[v][u] = w2; } for (int i = 1; i <= n; i++) waitTime[i] = in.nextInt(); waitTime[y] = 0; for (int i = 1; i <= n; i++) dis1[i][i] = dis2[i][i] = 0; for (int k = 1; k <= n; k++) for (int i = 1; i <= n; i++) for (int j = 1; j <= n; j++) { if (dis1[i][k] != -1 && dis1[k][j] != -1 && (dis1[i][k] + dis1[k][j] < dis1[i][j] || dis1[i][j] == -1)) dis1[i][j] = dis1[i][k] + dis1[k][j]; if (dis2[i][k] != -1 && dis2[k][j] != -1 && (dis2[i][k] + dis2[k][j] < dis2[i][j] || dis2[i][j] == -1)) dis2[i][j] = dis2[i][k] + dis2[k][j]; } int ans = Integer.MAX_VALUE; for (int i = 1; i <= n; i++) for (int j = 1; j <= n; j++) ans = Math.min(ans, Math.max(dis1[x][i], waitTime[i]) + dis2[i][j] + dis1[j][y]); System.out.println(ans); } }
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