C++-蓝桥杯-排它平方数[2013][水题][枚举]

#include <bits/stdc++.h>
using namespace std;
bool vis[15];
bool check(long long a,long long b){
    memset(vis,0,sizeof(vis));
    while(a)
        if(!vis[a%10])vis[a%10]=1,a/=10;
        else return false;
    while(b)
        if(vis[b%10])return false;
        else b/=10;
    return true;
}
int main(){//output: 639172
    for(long long i=1e5;i<1e6;i++)
        if(i==203879)continue;
        else if(check(i,i*i)){
            cout<<i<<endl;
            return 0;
        }
}