Geting the error in first two test cases

#1

#include
#include <bits/stdc++.h>
using namespace std;
int main() {
long long int n;
cin>>n;
long long int z=nn2;
long long int sv[z]={0};
sv[0]=1;
sv[1]=1;
//int x=n;
//x++;
for(long long int i=2;i<=z;i++)
{
if(sv[i]==0)
for(long long int j=2*i;j<=z;j=j+i)
sv[j]=1;
}
vector v2;
for(long long int i=0;i<=z;i++)
{
if(sv[i]==0)
v2.push_back(i);
}
cout<<v2[n-1];
}

#2

You have to use Prime Sieve here.Only then it will pass all the test cases.
Refer these:


#3

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