洛谷挑战LV3--数论

P2154

java自带大数据处理

import java.*;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.Scanner;

public class Main {
     static public void main(String args[]) {
    	 Scanner in = new Scanner(System.in);
    	 BigInteger a = in.nextBigInteger();
    	 BigInteger b = in.nextBigInteger();
    	 System.out.println(a.gcd(b));
     }
}

P1414

逐个求每个因子的个数就行

#include
#include
#include
#include
#include
using namespace std;

int n,t = 0,c[1000010] = {0};

int main(){
	scanf("%d",&n);
	int x;
	for(int i = 1;i<=n;++i){
		scanf("%d",&x);
		t = max(t,x);
		for(int i = 1;i*i<=x;++i){
			if(x % i == 0){
				++c[i];
				if(i*i != x)
				++c[x/i];
			}
		}
	}
	for(int i = 1;i<=n;++i){
		while(c[t] < i) --t;
		cout<