Codeforces - 416A Guess a number!

The following program is my ACcepted code for Codeforces -416A .
It's a for everybody to learn and discuss.
If there is any mistake or comment, please let me know.  :D

此乃Codeforces 416A 的AC code!

歡迎一同討論學習，如有錯誤與任何建議請留言 : )

點這裡看題目 Click here to see this Problem!

	//This program is for Codeforces 416A Guess a number!
	//題目來源 Problem link: http://codeforces.com/problemset/problem/416/A
	/** my mistakes from code on paper
	compiler errers:
	1. reduceRange(char[] oper) --> reduceRange (char* oper)
	2. char[] reverseOper(char op) --> char* reverseOper(char* op)
	3. declare function reverseOper after the function reduceRange
	problem-solving logic: right
	*/
	#include<stdio.h>
	#include<string.h>
	char* reverseOper(char* op)
	{
	if(strcmp(op, "<") == 0)
	return ">=";
	if(strcmp(op, "<=") == 0)
	return ">";
	if(strcmp(op, ">") == 0)
	return "<=";
	if(strcmp(op, ">=") == 0)
	return "<";
	}
	void reduceRange(char* oper, int num, char ans, int& Max, int& Min)
	{
	if(ans == 'N')
	oper = reverseOper(oper);
	if(strcmp(oper, "<") == 0){
	if(Max > (num - 1))
	Max = (num - 1);
	}
	else if(strcmp(oper, "<=") == 0){
	if(Max > num)
	Max = num;
	}
	else if(strcmp(oper, ">") == 0){
	if(Min < (num + 1))
	Min = (num + 1);
	}
	else if(strcmp(oper, ">=") == 0){
	if(Min < num)
	Min = num;
	}
	}
	int main()
	{
	int n, Max, Min, num;
	char oper[3], ans;
	while(scanf("%d", &n) != EOF)
	{
	Max = 2e9;
	Min = -2e9;
	while(n--)
	{
	scanf("%s %d %c", &oper, &num, &ans);
	reduceRange(oper, num, ans, Max, Min);
	}
	//printf("%d\t%d\n", Min, Max);
	if(Min > Max)
	printf("Impossible\n");
	else
	printf("%d\n", Min);
	}
	return 0;
	}

view raw 416A Guess a number!.cpp hosted with ❤ by GitHub

Please feel free to use it after adding this blog as an reference. (http://autekroy.blogspot.tw) If there is any mistake or comment, please let me know. :D 

歡迎使用與分享任何內容，但請記得標示此部落格為出處。(http://autekroy.blogspot.tw/) 如果有發現任何的錯誤與建議請留言或跟我連絡。 : )