MZL‘s chemistry

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)
Total Submission(s): 1306    Accepted Submission(s): 601

Problem Description

MZL define F(X) as the first ionization energy of the chemical element X

Now he get two chemical elements U,V,given as their atomic number,he wants to compare F(U) and F(V)

It is guaranteed that atomic numbers belongs to the given set:{1,2,3,4,..18,35,36,53,54,85,86}

It is guaranteed the two atomic numbers is either in the same period or in the same group

It is guaranteed that x≠y

Input

There are several test cases

For each test case,there are two numbers u,v,means the atomic numbers of the two element

Output

For each test case,if F(u)>F(v),print "FIRST BIGGER",else print"SECOND BIGGER"

Sample Input

1 2
5 3

Sample Output

SECOND BIGGER
FIRST BIGGER

水题。

给出两个元素的原子序数，要求比较哪个的第一电离能大....

化学都忘得差不多了==

不过好在限定了元素的范围，基本都是短周期的。

需要注意的是二三主族，五六主族，因为p轨道的全空和半充满会有反常情况（这个叫洪特规则？）

/*************************************************************************
    > File Name: code/multi/#5/1005.cpp
    > Author: 111qqz
    > Email: [email protected]
    > Created Time: 2015年08月04日 星期二 13时27分07秒
 ************************************************************************/

#include<iostream>
#include<iomanip>
#include<cstdio>
#include<algorithm>
#include<cmath>
#include<cstring>
#include<string>
#include<map>
#include<set>
#include<queue>
#include<vector>
#include<stack>
#define y0 abc111qqz
#define y1 hust111qqz
#define yn hez111qqz
#define j1 cute111qqz
#define tm crazy111qqz
#define lr dying111qqz
using namespace std;
#define REP(i, n) for (int i=0;i<int(n);++i)
typedef long long LL;
typedef unsigned long long ULL;
const int inf = 0x7fffffff;

 bool cmp (int x,int y)
{
    int p[3],g[3];
    int a[3];
    a[1]=x;
    a[2]=y;
    for ( int i = 1;  i <= 2 ; i++)
    {
    if (a[i]>=1&&a[i]<=2)
    {
        p[i] = 1;
    }
    if (a[i]>=3&&a[i]<=10)
    {
        p[i] = 2;
    }
    if (a[i]>=11&&a[i]<=18)
    {
        p[i] = 3;
    }
    if (a[i]>=35&&a[i]<=36)
    {
        p[i]=4;
    }
    if (a[i]>=53&&a[i]<=54)
    {
        p[i] = 5;
    }
    if (a[i]>=85&&a[i]<=86)
    {
        p[i] = 6;
    }

    }
    if (p[1]==p[2])
    {
    if (x==4&&y==5)
    {
        return true;
    }
    if (x==5&&y==4)
    {
        return false;
    }
    if (x==12&&y==13)
    {
        return true;
    }
    if (x==13&&y==12)
    {
        return false;
    }
    if (x==7&&y==8)
    {
        return true;
    }
    if (x==8&&y==7)
    {
        return false;
    }
    if (x==15&&y==16)
    {
        return true;
    }
    if (x==16&&y==15)
    {
        return false;
    }
    return x>y;
    }
    else
    {
    return x<y;
    }
}

int main()
{
    int  u,v;
    while (~scanf("%d %d",&u,&v))
    {

    if (cmp(u,v))
    {
        printf("FIRST BIGGER\n");
    }
    else
    {
        printf("SECOND BIGGER\n");
    }
    }

    return 0;
}

2015 多校 #5 1005 MZL's chemistry