题意:给定一个二叉树,并对每一个进行编号和规定,现在给你一个值,问你是第几个。
析:这个题,我想了好久才想出来,这个真是数据结构练的太差了,不够扎实,这个题,应该从下向上推,如果分子大于分母,那么这个编号就是奇数,
要加上1,如果是小于,就不用加.推到第一个就好。
代码如下:
#pragma comment(linker, "/STACK:1024000000,1024000000") #include <cstdio> #include <string> #include <cstdlib> #include <cmath> #include <iostream> #include <cstring> #include <set> #include <queue> #include <algorithm> #include <vector> #include <map> #include <cctype> #include <stack> using namespace std; typedef long long LL; typedef pair<int, int> P; const int INF = 0x3f3f3f3f; const double inf = 0x3f3f3f3f3f3f; const double PI = acos(-1.0); const double eps = 1e-8; const int maxn = 10 + 5; const int mod = 1e9; const char *mark = "+-*"; const int dr[] = {-1, 0, 1, 0}; const int dc[] = {0, 1, 0, -1}; int n, m; inline bool is_in(int r, int c){ return r >= 0 && r < n && c >= 0 && c < m; } LL f(LL a, LL b){ if(a == b) return 1; if(a < b) return f(a, b-a) * 2; if(a > b) return 2 * f(a-b, b) + 1; } int main(){ int T; cin >> T; while(T--){ LL a, b; scanf("%d %lld/%lld", &m, &a, &b); printf("%d ", m); printf("%lld\n", f(a, b)); } return 0; }