添加0062.不同路径.md C语言滚动数组解法

problems/0062.不同路径.md

@@ -436,6 +436,26 @@ int uniquePaths(int m, int n){
 }
 ```
 
+滚动数组解法:
+```c
+int uniquePaths(int m, int n){
+    int i, j;
+
+    // 初始化dp数组
+    int *dp = (int*)malloc(sizeof(int) * n);
+    for (i = 0; i < n; ++i)
+        dp[i] = 1;
+
+    for (j = 1; j < m; ++j) {
+        for (i = 1; i < n; ++i) {
+            // dp[i]为二维数组解法中dp[i-1][j]。dp[i-1]为二维数组解法中dp[i][j-1]
+            dp[i] += dp[i - 1];
+        }
+    }
+    return dp[n - 1]; 
+}
+```
+
 ### Scala
 
 ```scala