输入与输出外挂

#include<iostream>#include<cstdio>#include<string.h>#include<algorithm>using namespace std;//bool vis[10];int a[10];int b[10];int n;/*void dfs(int cur){if(cur==n){for(int i=0;i<cur;++i) cout<<a[i];cout<<endl;return;}for(int i=0;i!=n;++i) if(!i||b[i-1]!=b[i]) { int c1=0,c2=0; for(int j=0;j<n;++j) if(b[i]==b[j]) c1++; for(int j=0;j<cur;++j) if(a[j]==b[i]) c2++; if(c1>c2) { a[cur]=b[i]; dfs(cur+1); } }}*/void in(int &a){char ch;while((ch=getchar())<'0'||ch>'9');for(a=0;ch>='0'&&ch<='9';ch=getchar()) a=a*10+ch-'0';}void out(int x){if(x>9) out(x/10); putchar(x%10+48);}int main(){while(cin>>n){for(int i=0;i!=n;++i) in(b[i]);sort(b,b+n);do{for(int i=0;i!=n;++i) out(b[i]);cout<<endl;}while(next_permutation(b,b+n));}return 0;}