[SCU4436] Easy Math [2015 Sichuan Province Contest Final A]

题意

题解

代码

/****************************************\
* Author : ztx
* Title  : A - Easy Math
* ALG    :
* CMT    : g++  I64d
* Time   :
\****************************************/

#include <cstdio>
#define Rep(i,l,r) for(i=(l);i<=(r);i++)
#define rep(i,l,r) for(i=(l);i< (r);i++)
#define Rev(i,r,l) for(i=(r);i>=(l);i--)
#define rev(i,r,l) for(i=(r);i> (l);i--)
typedef long long ll ;
typedef double lf ;
int CH , NEG ;
template <typename TP>inline void read(TP& ret) {
ret = NEG = 0 ; while (CH=getchar() , CH<'!') ;
if (CH == '-') NEG = true , CH = getchar() ;
while (ret = ret*10+CH-'0' , CH=getchar() , CH>'!') ;
if (NEG) ret = -ret ;
}
template <typename TP>inline void readc(TP& ret) {
while (ret=getchar() , ret<'!') ;
while (CH=getchar() , CH>'!') ;
}
template <typename TP>inline void reads(TP *ret) {
ret[0]=0;while (CH=getchar() , CH<'!') ;
while (ret[++ret[0]]=CH,CH=getchar(),CH>'!') ;
ret[ret[0]+1]=0;
}

#include <cmath>
#include <map>

#define  maxn  10010LL

std::map<int,bool>ok ;
const char ans[2][10] = {"No","Yes"} ;

int main() {
int i , n , a , flag ;
//    #define READ
#ifdef  READ
freopen(".in" ,"r",stdin ) ;
freopen(".out","w",stdout) ;
#endif
a = floor(sqrt(1E9)) ;
ok.clear() ;
Rep (i,0,a)
ok[i*i] = true ;
while (scanf("%d", &n)!=EOF) {
flag = true ;
Rep (i,1,n)
if (read(a),!ok[a]) flag = false ;
printf("%s\n", ans[flag]) ;
}
#ifdef  READ
fclose(stdin) ; fclose(stdout) ;
#else
getchar() ; getchar() ;
#endif
return 0 ;
}