无法在下面的代码中找出导致缓冲区溢出的原因。我认为这与向量有关,但我在防止越界访问。还有其他可能导致溢出的东西吗?
class Solution {
public:
bool canPartition(vector<int>& nums) {
int sum = 0;
bool canPartition = true;
vector<vector<int>> dp(nums.size(), vector<int>(sum / 2 + 1, -1));
sum = accumulate(nums.begin(),nums.end(),0);
if (sum % 2 != 0)
{
canPartition = false;
}
if (true == canPartition)
{
canPartition = canPartitionRecursive(nums, 0, sum/2, dp);
}
return canPartition;
}
bool canPartitionRecursive(vector<int>& nums, int index, int sum,
vector<vector<int>>& dp)
{
if (sum == 0)
{
return true;
}
if (index >= nums.size() || sum < 0)
{
return false;
}
if (dp[index][sum] != -1)
{
if (true == canPartitionRecursive(nums, index+1, sum - nums[index],dp))
{
dp[index][sum] = 1;
return true;
}
dp[index][sum] = canPartitionRecursive(nums, index + 1, sum, dp);
}
return dp[index][sum] = 1? true:false;
}
};
答案 0 :(得分:0)
这看起来像是换位错误(所有子向量的大小均为1):
int sum = 0;
vector<vector<int>> dp(nums.size(), vector<int>(sum / 2 + 1, -1));
sum = accumulate(nums.begin(),nums.end(),0);
也许sum
的计算应该在dp
初始化之前移动?