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题目:已知{xn}的递归公式,求x[n]。
分析:简单题。直接计算即可:x0 = 1;xi = x?i-sqrt(i)? + x?ln(i)? + x?i sin2(i)?。
说明:打表计算查询输出。
#include <algorithm> #include <iostream> #include <cstdlib> #include <cstring> #include <cstdio> #include <cmath> using namespace std; int x[1000001]; int main() { x[0] = 1; for (int i = 1; i < 1000001; ++ i) x[i] = (x[int(i-sqrt(i+0.0))] + x[int(log(i+0.0))] + x[int(i*sin(i)*sin(i))])%1000000; int n; while (cin >> n && n >= 0) cout << x[n] << endl; return 0; }
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原文地址:http://blog.csdn.net/mobius_strip/article/details/45800591