'commit'

TangDou/Topic/HDU1385.cpp

@@ -4,17 +4,17 @@ const int INF = 0x3f3f3f3f;
 
 const int N = 1003;
 int g[N][N], path[N][N]; // 邻接矩阵、路径
-int n, x, y, cost[N];    // 额外费用
+int n, x, y, w[N];       // 额外费用
 void floyd() {
     for (int k = 1; k <= n; k++)
         for (int i = 1; i <= n; i++)
             if (g[i][k] != INF)
                 for (int j = 1; j <= n; j++) {
-                    if (g[i][j] > g[i][k] + g[k][j] + cost[k]) {
-                        g[i][j] = g[i][k] + g[k][j] + cost[k];
+                    if (g[i][j] > g[i][k] + g[k][j] + w[k]) {
+                        g[i][j] = g[i][k] + g[k][j] + w[k];
                         path[i][j] = path[i][k];
                     }
-                    if (g[i][j] == g[i][k] + g[k][j] + cost[k]) {
+                    if (g[i][j] == g[i][k] + g[k][j] + w[k]) {
                         if (path[i][j] > path[i][k]) // 字典序
                             path[i][j] = path[i][k];
                     }
@@ -24,12 +24,12 @@ int main() {
     while (cin >> n && n) {
         for (int i = 1; i <= n; i++) {
             for (int j = 1; j <= n; j++) {
-                path[i][j] = j;
+                path[i][j] = j; // 路径初始化,如果i->j有边，则记录path[i][j]=j,就是记录i->j的中间节点
                 cin >> g[i][j];
                 if (g[i][j] == -1) g[i][j] = INF;
             }
         }
-        for (int i = 1; i <= n; i++) cin >> cost[i];
+        for (int i = 1; i <= n; i++) cin >> w[i];
         floyd();
 
         while (cin >> x >> y) {
@@ -37,13 +37,13 @@ int main() {
             printf("From %d to %d :\n", x, y);
             printf("Path: %d", x);
             int u = x, v = y;
+            // 用循环打印路径
             while (x != y) {
                 printf("-->%d", path[x][y]);
                 x = path[x][y];
             }
 
             puts("");
-
             if (g[u][v] < INF)
                 printf("Total cost : %d\n", g[u][v]);
             else