2017.3.14 不重复数字 思考记录

       其实，这是一个stl入门题       map水过

#include<iostream>#include<cstdio>using namespace std;#include<map>map<int,bool>you;bool diyi;int n,m,i,j,t,x;int main(){scanf("%d",&t);while(t--){   diyi=0;you.clear();scanf("%d",&n);for(i=1;i<=n;i++){scanf("%d",&x);if(!diyi){diyi=1;printf("%d",x);you[x]=1;continue;}if(!you.count(x))                  {                  printf(" %d",x);                  you[x]=1;  }}if(t)printf("\n");}}