126 lines
3.4 KiB
C++
126 lines
3.4 KiB
C++
#include <stack>
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#include <cstdio>
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#include <list>
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#include <set>
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#include <iostream>
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#include <string>
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#include <vector>
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#include <queue>
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#include <functional>
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#include <cstring>
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#include <algorithm>
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#include <cctype>
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#include <string>
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#include <map>
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#include <cmath>
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using namespace std;
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#define LL long long
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#define ULL unsigned long long
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#define SZ(x) (int)x.size()
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#define Lowbit(x) ((x) & (-x))
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#define MP(a, b) make_pair(a, b)
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#define MS(arr, num) memset(arr, num, sizeof(arr))
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#define PB push_back
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#define X first
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#define Y second
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#define MID(a, b) (a + ((b - a) >> 1))
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#define LC rt << 1, l, mid
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#define RC rt << 1|1, mid + 1, r
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#define LRT rt << 1
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#define RRT rt << 1|1
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const double PI = acos(-1.0);
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const int INF = 0x3f3f3f3f;
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const double eps = 1e-8;
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const int MAXN = 110;
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const int MOD = 1e9 + 7;
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const int dir[][2] = { {-1, 0}, {0, -1}, { 1, 0 }, { 0, 1 } };
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int cases = 0;
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typedef pair<int, int> pii;
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struct NUM
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{
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int sum, multiple, num, square, cube, quad;
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}arr[MAXN];
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void Handle(NUM &num)
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{
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int tmp = num.num, curNum = num.num;
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int sum = 0, multiple = 1;
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while (tmp)
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{
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sum += tmp % 10;
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multiple *= tmp % 10;
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tmp /= 10;
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}
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num.sum = sum; num.multiple = multiple;
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num.square = curNum <= 1000 ? curNum*curNum : -1;
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num.quad = curNum <= 100 ? curNum*curNum*curNum*curNum : -1;
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num.cube = curNum <= 100 ? curNum*curNum*curNum : -1;
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}
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set<int> cube, square, quad;
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int ansCnt;
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void Init()
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{
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for (int i = 1; i <= 1000; i++)
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{
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square.insert(i*i);
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if (i <= 100) cube.insert(i*i*i), quad.insert(i*i*i*i);
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}
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}
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bool isPrime(int num)
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{
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if (num == 1) return false;
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if (num == 2) return true;
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for (int i = 2; i <= (int)sqrt(num+0.5); i++)
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if (num % i == 0) return false;
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return true;
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}
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int n, cnt[MAXN];
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void Solve(const int &cur)
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{
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cnt[cur] = 0;
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int curNum = arr[cur].num;
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const NUM &num = arr[cur];
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for (int i = 0; i < n; i++)
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{
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if (i == cur) continue;
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NUM &k = arr[i];
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if (k.num % curNum == 0) cnt[cur]++;
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if (curNum % k.num == 0) cnt[cur]++;
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if (k.square == curNum) cnt[cur]++;
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if (k.cube == curNum) cnt[cur]++;
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if (k.quad == curNum) cnt[cur]++;
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if (curNum % k.sum == 0) cnt[cur]++;
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if (k.multiple != 0 && curNum % k.multiple == 0) cnt[cur]++;
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}
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if (square.count(curNum)) cnt[cur]++;
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if (cube.count(curNum)) cnt[cur]++;
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if (quad.count(curNum)) cnt[cur]++;
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if (curNum % num.sum == 0) cnt[cur]++;
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if (num.multiple != 0 && curNum % num.multiple == 0) cnt[cur]++;
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if (isPrime(curNum)) cnt[cur]++;
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ansCnt = max(ansCnt, cnt[cur]);
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}
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int main()
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{
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Init();
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int T;
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scanf("%d", &T);
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while (T--)
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{
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ansCnt = -1;
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scanf("%d", &n);
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for (int i = 0; i < n; i++)
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{
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scanf("%d", &arr[i].num);
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Handle(arr[i]);
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}
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for (int i = 0; i < n; i++) Solve(i);
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vector<int> ans;
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for (int i = 0; i < n; i++)
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if (ansCnt == cnt[i]) ans.PB(arr[i].num);
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sort(ans.begin(), ans.end());
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printf("DATA SET #%d\n", ++cases);
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for (int i = 0; i < SZ(ans); i++) printf("%d\n", ans[i]);
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}
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return 0;
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}
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