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/** * @brief uva 11549 * @file 11549.cpp * @author mianma * @created 2014/12/31 11:43 * @edited 2014/12/31 11:43 * @type * @note floyd判圈算法 */ #include <fstream> #include <iostream> #include <cstring> #include <cmath> using namespace std; #define max(a, b) ((a) > (b) ? (a) : (b)) #define min(a, b) ((a) > (b) ? (b) : (a)) #define abs(a) ((a) > 0 ? (a) : (0 - (a))) #define CLR(vec) memset(vec, 0, sizeof(vec)) #ifdef DEBUG ifstream in; ofstream out; #define CIN in #define COUT out #else #define CIN cin #define COUT cout #endif #define MAXB 25 typedef long long int ll; int t, n; ll k; ll next(int n, ll num){ static int buf[MAXB]; ll tmp = num*num; int cnt = 0; while(tmp != 0){ buf[cnt++] = tmp%10; tmp /= 10; } n = min(n, cnt); ll ans = 0; for(int i = 0; i < n; i++) ans = ans*10 + buf[--cnt]; return ans; } int solve(int n, ll k){ ll t1, t2, ans; t1 = t2 = ans = k; do{ t1 = next(n, t1); t2 = next(n, t2); ans = max(t2, ans); t2 = next(n, t2); ans = max(t2, ans); }while(t1 != t2); return ans; } int main(void){ ios_base::sync_with_stdio(0); #ifdef DEBUG CIN.open("./in", ios::in); COUT.open("./out", ios::out); #endif CIN >> t; for(int cases = 1; cases <= t; cases++){ CIN >> n >> k; COUT << solve(n, k) << "\n"; } return 0; }
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原文地址:http://my.oschina.net/u/572632/blog/362622