Find Integer----費馬大定理

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 6597    Accepted Submission(s): 1852Special Judge  

Problem Description

people in USSS love math very much, and there is a famous math problem . give you two integers n,a,you are required to find 2 integers b

Input

one line contains one integer T;(1≤T≤1000000) next T lines contains two integers n,a;(0≤n≤1000,000,000,3≤a≤40000)

Output

print two integers b,c if b,c exits;(1≤b,c≤1000,000,000); else print two integers -1 -1 instead.

Sample Input

1 2 3

Sample Output

4 5

#include<iostream>
#include<cstdio>
using namespace std;
typedef long long ll;
int main(){
    ll t,n,a,b,c;
    scanf("%lld",&t);
    while(t--){
        scanf("%lld%lld",&n,&a);
        if(n==0||n>2){
            printf("-1 -1\n");
        }else if(n==1){
            b=1;
            c=a+b;
            printf("%lld %lld\n",b,c);
        }else{
            if(a%2==0){
                a/=2;
                b=a*a-1;
                c=a*a+1;
            }else{
                a--;
                a/=2;
                b=2*a*a+2*a;
                c=b+1;
            }
            printf("%lld %lld\n",b,c);
        }
    }
    return 0;
}