OJ Board

What's wrong with this one, it gives WA!
[cpp]
#include <iostream>
#include <complex>
#include <cmath>
#include <stdio.h>


using namespace std;

int main() {
long pi = 0, qi = 0, ni = 0;

while (scanf("%d %d %d", &pi, &qi, &ni) > 2) {
double p = pi;
double q = qi;
double n = ni;

complex ...