SDNU 1102.小树林(水题)

mac2022-06-30  24

Description

LG家门口有一片小树林,在小树林中央有一块写有相关说明的标牌,其中关于树木数量的部分是这么写的: “……这片树林中的树木可构成a个以这块标牌为圆心的同心圆,其中最靠近这块标牌的圆上有b棵树,其他圆上树木数量都是向内一层的圆上树木数量的c倍。……” 试求LG家门口这片小树林有多少树木。

Input

一行,三个正整数 a b c

Output

一行,计算结果,保证不会太大(不需要用高精度)

Sample Input

63 1 2

Sample Output

9223372036854775807

Source

Unknown #include <cstdio> #include <iostream> #include <string> #include <cstring> #include <cmath> #include <algorithm> #include <queue> #include <map> #include <vector> using namespace std; #define ll long long unsigned ll a, b, c;//如果不行,就改为ll unsigned ll sum = 0, s= 0; unsigned ll qsm(unsigned ll x, unsigned ll y) { unsigned ll ans = 1; while(y) { if(y&1)ans = ans*x; y /= 2; x *= x; } return ans; } int main() { scanf("%llu%llu%llu", &a, &b, &c); sum = qsm(c, a); sum = (sum-1)*b/(c-1); printf("%llu\n", sum); return 0; }

 

转载于:https://www.cnblogs.com/RootVount/p/10946648.html

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