fix: overflow in LeftMove

2023-11-01 17:29:03 +08:00
parent 4bfcf1e5d6
commit 7c8904ff51
1 changed files with 2 additions and 1 deletions
--- a/src/int2048.cpp
+++ b/src/int2048.cpp
@ -398,7 +398,8 @@ void int2048::LeftMoveBy(int L) {
  this->num_length += big_move * int2048::kNum;
  if (small_move == 0) return;
  for (int i = this->buf_length - 1; i >= 0; i--) {
-    (this->val[i] *= kPow10[small_move]) %= int2048::kStoreBase;
+    this->val[i] =
+        ((long long)this->val[i] * kPow10[small_move]) % int2048::kStoreBase;
    if (i - 1 >= 0) {
      this->val[i] += this->val[i - 1] / kPow10[int2048::kNum - small_move];
    }