标签:blog io os for sp on 2014 log cti
题意需要注意的一点就是,
序列是从外层最小的那个位置顺时针转一圈得来的。并且要求10在内圈
所以,这题暴力的话,假定最上面那个点一定是第一个点,算下和更新下就行。
#include <iostream> #include <cstring> #include <cstdio> #include <algorithm> #include <cstdlib> #include <ctime> #include <set> #include <vector> #include <map> #define MAXN 111 #define MAXM 55555 #define INF 1000000007 using namespace std; int a[12]; int sum[6]; string ans, tmp; int main() { int n = 10; int first = 1; ans = "", tmp = ""; for(int i = 1; i <= n; i++) a[i] = i; do { int pos = 1; for(int i = 1; i <= 5; i++) { if(a[i] < a[pos]) pos = i; int z = i + 6; if(z > 10) z = z - 5; sum[i] = a[i] + a[i + 5] + a[z]; } if(pos != 1) continue; int flag = 1; for(int i = 2; i <= 5; i++) if(sum[i] != sum[i - 1]) flag = 0; if(sum[1] != sum[5]) flag = 0; for(int i = 6; i <= 10; i++) { if(a[i] == 10) flag = 0; } tmp = ""; if(flag) { for(int i = 1; i <= 5; i++) { int z = i + 6; if(z > 10) z = z - 5; tmp += (a[i] + 'a'); tmp += (a[i + 5] + 'a'); tmp += (a[z] + 'a'); } if(!first) { if(ans < tmp) ans = tmp; } else { ans = tmp; first = 1; } } }while(next_permutation(a + 1, a + n + 1)); for(int i = 0; i < 15; i++) printf("%d", ans[i] - 'a'); return 0; }
标签:blog io os for sp on 2014 log cti
原文地址:http://blog.csdn.net/sdj222555/article/details/40516001