数组

int firstMissingPositive(int* nums, int numsSize){
int a[10000001]={0};
while(numsSize--){
    if(nums[numsSize]<=0||nums[numsSize]>=10000000)
    continue;
    else if(a[nums[numsSize]]==0)
    a[nums[numsSize]]=1;
}
int x=0;
while(a[++x]==1);
return x;
}
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