1036 Boys vs Girls
This time you are asked to tell the difference between the lowest grade of all the male students and the highest grade of all the female students.
Input Specification:
Each input file contains one test case. Each case contains a positive integer N, followed by N lines of student information. Each line contains a student’s name, gender, ID and grade, separated by a space, where name and ID are strings of no more than 10 characters with no space, gender is either F (female) or M (male), and grade is an integer between 0 and 100. It is guaranteed that all the grades are distinct.
Output Specification:
For each test case, output in 3 lines. The first line gives the name and ID of the female student with the highest grade, and the second line gives that of the male student with the lowest grade. The third line gives the difference gradeF−gradeM. If one such kind of student is missing, output Absent in the corresponding line, and output NA in the third line instead.
Sample Input 1:
3 Joe M Math990112 89 Mike M CS991301 100 Mary F EE990830 95
Sample Output 1:
Mary EE990830 Joe Math990112 6
Sample Input 2:
1 Jean M AA980920 60
Sample Output 2:
Absent Jean AA980920 NA
思路
- 这道题可以边输入边判断，用几个变量来存储对应的最大值和最小值。
- 最后输出的时候要注意男生和女生的个数。
代码
#include<bits/stdc++.h> using namespace std; int main() { int n; cin >> n; string girl_name, girl_id; int girl_score; string boy_name, boy_id; int boy_score; for (int i = 0; i < n; i++) { string name, gender, id; int score; cin >> name >> gender >> id >> score; if (gender == "F") //如果是女生 { if (girl_name.empty() || score > girl_score) { girl_name = name; girl_id = id; girl_score = score; } } else //如果是男生 { if (boy_name.empty() || score < boy_score) { boy_name = name; boy_id = id; boy_score = score; } } } //判断是否有女生 if (girl_name.empty()) puts("Absent"); else cout << girl_name << " " << girl_id << endl; //判断是否有男生 if (boy_name.empty()) puts("Absent"); else cout << boy_name << " " << boy_id << endl; //判断男生女生是否都存在，如果存在就输出成绩差值 if (boy_name.size() && girl_name.size()) cout << girl_score - boy_score << endl; else cout << "NA" << endl; return 0; }
