hdoj 5595 GTW likes math 【水题】

GTW likes math

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others)

Total Submission(s): 357    Accepted Submission(s): 183

Problem Description

After attending the class given by Jin Longyu, who is a specially-graded teacher of Mathematics, GTW started to solve problems in a book titled “From Independent Recruitment to Olympiad”. Nevertheless, there are too many problems in the book yet GTW had a sheer number of things to do, such as dawdling away his time with his young girl. Thus, he asked you to solve these problems.

In each problem, you will be given a function whose form is like f(x)=ax2+bx+c. Your assignment is to find the maximum value and the minimum value in the integer domain [l,r].

 

Input

The first line of the input file is an integer T, indicating the number of test cases. (T≤1000)

In the following T lines, each line indicates a test case, containing 5 integers, a,b,c,l,r. (|a|,|b|,|c|≤100,|l|≤|r|≤100), whose meanings are given above.

 

Output

In each line of the output file, there should be exactly two integers, max and min, indicating the maximum value and the minimum value of the given function in the integer domain [l,r], respectively, of the test case respectively.

 

Sample Input

11 1 1 1 3

 

Sample Output

13 3
Hint
$f_1=3,f_2=7,f_3=13,max=13,min=3$
 

 

题意：给定整数区间[l, r]问f(x) = a*x*x + b*x + c的最大值和最小值。

区间范围小，暴力即可。

AC代码：

#include <cstdio>#include <cstring>#include <cmath>#include <cstdlib>#include <algorithm>#include <queue>#include <stack>#include <map>#include <set>#include <vector>#define INF 0x3f3f3f3f#define eps 1e-8#define MAXN (100000+1)#define MAXM (5000000000)#define Ri(a) scanf("%d", &a)#define Rl(a) scanf("%lld", &a)#define Rf(a) scanf("%lf", &a)#define Rs(a) scanf("%s", a)#define Pi(a) printf("%d\n", (a))#define Pf(a) printf("%.2lf\n", (a))#define Pl(a) printf("%lld\n", (a))#define Ps(a) printf("%s\n", (a))#define W(a) while(a--)#define CLR(a, b) memset(a, (b), sizeof(a))#define MOD 1000000007#define LL long long#define lson o<<1, l, mid#define rson o<<1|1, mid+1, r#define ll o<<1#define rr o<<1|1using namespace std;int main(){    int t; Ri(t);    while(t--)    {        int a, b, c, l, r;        Ri(a); Ri(b); Ri(c);        Ri(l); Ri(r);        int Min = INF, Max = -INF;        for(int i = l; i <= r; i++)        {            int val = a*i*i + b*i + c;            Min = min(Min, val);            Max = max(Max, val);        }        printf("%d %d\n", Max, Min);    }    return 0;}