PAT1036:Boys vs Girls
1036. Boys vs Girls (25)
时间限制 400 ms 内存限制 65536 kB 代码长度限制 16000 B 判题程序 Standard 作者 CHEN, YueThis 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 95Sample Output 1:
Mary EE990830 Joe Math990112 6Sample Input 2:
1 Jean M AA980920 60Sample Output 2:
Absent Jean AA980920 NA
思路
很简单,判断每次输入的是男是女,再比较下之前保存的成绩,分别保留女生最高和男生最低的成绩,最后计算下差值即可。有任何一方为空则按题要求输出对应的错误处理即可。
代码
#include<iostream> #include<vector> #include<string> using namespace std; int main() { int N; while(cin >> N) { vector<string> lowestmale(4); vector<string> highestfemale(4); string name,sex,subject,grade; for(int i = 0; i < N;i++) { cin >> name >> sex >> subject >> grade; if(sex == "M") { if(lowestmale[3] == "" || (lowestmale[3] != "" && stoi(lowestmale[3]) > stoi(grade))) { //如果是第一次输入或者这一次输入的成绩比以往更低 lowestmale[0] = name; lowestmale[1] = sex; lowestmale[2] = subject; lowestmale[3] = grade; } } else { if(highestfemale[3] == "" || (highestfemale[3] != "" && stoi(highestfemale[3]) < stoi(grade))) { //如果是第一次输入或者这一次输入的成绩比以往更高 highestfemale[0] = name; highestfemale[1] = sex; highestfemale[2] = subject; highestfemale[3] = grade; } } } if(highestfemale[0] != "") cout << highestfemale[0] << " " <<highestfemale[2] << endl; else cout << "Absent" << endl; if(lowestmale[0] != "") cout << lowestmale[0] << " " <<lowestmale[2] << endl; else cout << "Absent" << endl; if(lowestmale[0] != "" && highestfemale[0] != "") cout << stoi(highestfemale[3]) - stoi(lowestmale[3]) << endl; else cout << "NA" << endl; } }
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