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Relative atomic mass

2024-10-07 23:44:39   216人阅读

Relative atomic mass

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)
Total Submission(s): 617    Accepted Submission(s): 516


Problem Description
Relative atomic mass is a dimensionless physical quantity, the ratio of the average mass of atoms of an element (from a single given sample or source) to 1技术分享2技术分享技术分享技术分享 of the mass of an atom of carbon-12 (known as the unified atomic mass unit).
You need to calculate the relative atomic mass of a molecule, which consists of one or several atoms. In this problem, you only need to process molecules which contain hydrogen atoms, oxygen atoms, and carbon atoms. These three types of atom are written as ’H’，’O’ and ’C’ repectively. For your information, the relative atomic mass of one hydrogen atom is 1, and the relative atomic mass of one oxygen atom is 16 and the relative atomic mass of one carbon atom is 12. A molecule is demonstrated as a string, of which each letter is for an atom. For example, a molecule ’HOH’ contains two hydrogen atoms and one oxygen atom, therefore its relative atomic mass is 18 = 2 * 1 + 16.

 

 

Input
The first line of input contains one integer N(N ≤ 10), the number of molecules. In the next N lines, the i-th line contains a string, describing the i-th molecule. The length of each string would not exceed 10.
 

 

Output
For each molecule, output its relative atomic mass.
 

 

Sample Input
5 H C O HOH CHHHCHHOH
 

 

Sample Output
1 12 16 18 46
 
Source
2016ACM/ICPC亚洲区沈阳站-重现赛（感谢东北大学）  
【思路】模拟
【code】
#include<iostream>
#include<cstdio>
using namespace std;
string s;
int ans,n;
int main()
{
    scanf("%d",&n);
    for(int i=1;i<=n;i++)
    {
        cin>>s;ans=0;
        for(int i=0;i<s.size();i++)
        {
            if(s[i]==‘C‘)ans+=12;
            if(s[i]==‘O‘)ans+=16;
            if(s[i]==‘H‘)ans++;
        }
        printf("%d\n",ans);
     } 
    return 0;
}

 

Relative atomic mass


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