URAL 1010 Discrete Function

【成绩】

 

ID	Date	Author	Problem	Language	Judgement result	Test #	Execution time	Memory used
2915760	06:44:13 6 Feb 2010	bake	1010	C++	Accepted		0.14	1 005 KB
2915757	06:42:35 6 Feb 2010	bake	1010	C++	Wrong answer	2	0.015	217 KB
2915723	05:17:32 6 Feb 2010	bake	1010	C++	Wrong answer	2	0.015	217 KB
2915720	05:15:23 6 Feb 2010	bake	1010	C++	Wrong answer	2	0.015	217 KB
2915719	05:14:08 6 Feb 2010	bake	1010	C++	Wrong answer	2	0.031	217 KB

 

【报告】

    这个不解释……

    题目太阴了——看了NOCOW才知道。

    不解释，真的不解释……

【程序】

// TASK: 1010 Discrete Function
#include <cstdlib>
#include <iostream>
#include <cmath>
#define N 100000
using namespace std;
double x[N+1];
long n;
long k;
inline double tanget(long i)
{
       return abs((x[i]-x[i+1])/(-1));
}
int main(int argc, char *argv[])
{
    cin >> n;
    for (long i=1;i<=n;i++)
        cin >> x[i];
    k=1;
    for (long i=2;i<n;i++)
        if (tanget(k)-tanget(i)<-1e-7)
           k=i;
    cout << k << " " << k+1 << endl;
   // system("PAUSE");
    return EXIT_SUCCESS;
}