Why am I getting segmentation fault in the following code?

#1

#include
#include
using namespace std;

vector primes;
bool b[1000005];

void sieve(){

b[0]=b[1]=false;
b[2]=true;

for(int i=3;i<=1000000;i+=2){
	b[i]=true;
}

for(int i=3;i<=1000000;i+=2){
	if(b[i]){
		for(int j=i*i;j<=1000000;j+=(2*i)){
			b[j]=false;
		}
	}
}

for(int i=0;i<=1000000;i++){
	if(b[i]){
		primes.push_back(i);
	}
}

}

int main(){

int t;
cin>>t;

sieve();

while(t--){

	int n;
	cin>>n;

	cout<<primes[n-1]<<endl;

}

return 0;

}

#2

Please share your code using ide.codingblocks.com , will let you know mistake.

#3

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