poj2769 Reduced ID Numbers 同余定理

来源：互联网发布：mac上怎么用latex 编辑：程序博客网时间：2024/05/19 06:39

题目很简单，写博客就是留给自己看的，还是个大菜鸟，

#include<iostream>#include<cstdio>#include<list>#include<algorithm>#include<cstring>#include<string>#include<queue>#include<stack>#include<map>#include<vector>#include<cmath>#include<memory.h>#include<set>#define ll long long#define LL __int64#define eps 1e-8#define e 2.718281828//const ll INF=9999999999999;#define M 400000100#define inf 0xfffffffusing namespace std;//vector<pair<int,int> > G;//typedef pair<int,int> P;//vector<pair<int,int>> ::iterator iter;////map<ll,int>mp;//map<ll,int>::iterator p;////vector<int>G[30012];int num[1000012];bool mark[100012];int main(void){int t;cin>>t;int n;while(t--){memset(num,0,sizeof(num));cin>>n;for(int i=1;i<=n;i++)cin>>num[i];bool flag;int ans;for(int i=1;;i++){memset(mark,false,sizeof(mark));flag=true;for(int j=1;j<=n;j++){if(mark[num[j]%i]){flag=false;break;}mark[num[j]%i]=true;}if(flag){ans=i;break;}}cout<<ans<<endl;}}