diff --git a/problems/0649.Dota2参议院.md b/problems/0649.Dota2参议院.md
index f1b3be11..3b61a9fe 100644
--- a/problems/0649.Dota2参议院.md
+++ b/problems/0649.Dota2参议院.md
@@ -244,6 +244,44 @@ var predictPartyVictory = function(senateStr) {
 };
 ```
 
+## TypeScript
+
+```typescript
+function predictPartyVictory(senate: string): string {
+    // 数量差：Count(Radiant) - Count(Dire)
+    let deltaRDCnt: number = 0;
+    let hasR: boolean = true,
+        hasD: boolean = true;
+    const senateArr: string[] = senate.split('');
+    while (hasR && hasD) {
+        hasR = false;
+        hasD = false;
+        for (let i = 0, length = senateArr.length; i < length; i++) {
+            if (senateArr[i] === 'R') {
+                if (deltaRDCnt < 0) {
+                    senateArr[i] = '';
+                } else {
+                    hasR = true;
+                }
+                deltaRDCnt++;
+            } else if (senateArr[i] === 'D') {
+                if (deltaRDCnt > 0) {
+                    senateArr[i] = '';
+                } else {
+                    hasD = true;
+                }
+                deltaRDCnt--;
+            }
+        }
+    }
+    return hasR ? 'Radiant' : 'Dire';
+};
+```
+
+
+
+
+
 
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