思路:xjb写
AC代码:
#include "iostream" #include "iomanip" #include "string.h" #include "stack" #include "queue" #include "string" #include "vector" #include "set" #include "map" #include "algorithm" #include "stdio.h" #include "math.h" #pragma comment(linker, "/STACK:102400000,102400000") #define bug(x) cout<<x<<" "<<"UUUUU"<<endl; #define mem(a,x) memset(a,x,sizeof(a)) #define step(x) fixed<< setprecision(x)<< #define mp(x,y) make_pair(x,y) #define pb(x) push_back(x) #define ll long long #define endl (" ") #define ft first #define sd second #define lrt (rt<<1) #define rrt (rt<<1|1) using namespace std; const ll mod=1e9+7; const ll INF = 1e18+1LL; const int inf = 1e9+1e8; const double PI=acos(-1.0); const int N=1e5+100; int n,k; map<int, int> M; int main(){ ios::sync_with_stdio(false),cin.tie(0),cout.tie(0); cin>>n; for(int i=1; i<=n; ++i){ int x;cin>>x; M[x]++; } if(M.size()!=2){ cout<<"NO "; return 0; } else{ for(auto i : M){ k=i.sd; } for(auto i : M){ if(k!=i.sd){ cout<<"NO "; return 0; } } cout<<"YES "; for(auto i : M){ cout<<i.ft<<" "; } } return 0; }