結果
問題 | No.130 XOR Minimax |
ユーザー |
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提出日時 | 2020-03-12 18:57:27 |
言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 121 ms / 5,000 ms |
コード長 | 2,986 bytes |
コンパイル時間 | 1,819 ms |
コンパイル使用メモリ | 172,328 KB |
実行使用メモリ | 15,800 KB |
最終ジャッジ日時 | 2024-09-12 22:56:49 |
合計ジャッジ時間 | 3,782 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 21 |
ソースコード
#include <bits/stdc++.h>using namespace std;/*{{{*/ //template#define rep(i,n) for(int i=0;i<(int)(n);i++)#define rrep(i,n) for(int i=(n)-1;i>=0;i--)constexpr int INF = numeric_limits<int>::max()/2;constexpr long long LINF = numeric_limits<long long>::max()/3;#define pb push_back#define eb emplace_back#define fi first#define se second#define all(v) (v).begin(),(v).end()#define sz(x) (int)(x).size()#define debug(x) cerr<<#x<<":"<<x<<endl#define debug2(x,y) cerr<<#x<<","<<#y":"<<x<<","<<y<<endl//struct fin{ fin(){ cin.tie(0); ios::sync_with_stdio(false); } } fin_;struct Double{ double d; explicit Double(double x) : d(x){} };ostream& operator<<(ostream& os,const Double x){ os << fixed << setprecision(20) << x.d; return os; }template<typename T> ostream& operator<<(ostream& os,const vector<T>& vec){ os << "["; for(const auto& v : vec){ os << v << ","; } os << "]"; returnos; }template<typename T,typename U> ostream& operator<<(ostream& os, const map<T,U>& mp){ os << "{"; for(auto& p : mp){ os << p << ","; } os << "}";return os; }template<typename T,typename U> ostream& operator<<(ostream& os,const pair<T,U>& p){ os << "(" << p.first << ","<< p.second <<")"; return os; }template<typename T> ostream& operator<<(ostream& os,const set<T>& st){ os<<"{"; for(T v:st) os<<v<<","; os <<"}"; return os; }template<typename T,typename U> inline void chmax(T &x,U y){ if(y>x) x = y; }template<typename T,typename U> inline void chmin(T &x,U y){ if(y<x) x = y; }using ll = long long;using ull = unsigned long long;using pii = std::pair<int,int>;using vi = std::vector<int>;typedef vector<vi> vvi;ll gcd(ll a,ll b){ if(b==0) return a; else return gcd(b,a%b); }constexpr ll TEN(int n) { return (n == 0) ? 1 : 10 * TEN(n - 1); }//constexpr double eps = 1e-14;constexpr double eps = 1e-10;constexpr ll mod = 1e9+7;const int dx[]={1,0,-1,0} ,dy[] = {0,1,0,-1};/*}}}*/// xのt-bit目を確定する. その時の最大値int f(int x,int t,vector<int>& v){/* cout << bitset<32>(x) << " " << t << " " << v << endl; */int n = v.size();if(t==0){int ret1 = 0;int ret2 = 0;for(int i=0;i<n;i++){ret1 = max(ret1, x^v[i]);ret2 = max(ret2, (x|(1<<t))^v[i]);}return min(ret1,ret2);}vector<int> b,c;for(int i=0;i<n;i++){if(v[i] & (1<<t)){ // 1b.emplace_back(v[i]);}else{ // 0c.emplace_back(v[i]);}}/* cout << "b : " << b << endl; *//* cout << "c : " << c << endl; */if(b.size() == n){return f(x|(1<<t), t-1, b);}else if(c.size() == n){return f(x,t-1, c);}else{int mx1 = (b.size() > 0) ? f(x,t-1,b) : INF;int mx2 = (c.size() > 0) ? f(x|(1<<t),t-1,c) : INF;return min(mx1,mx2);}}int main(){int n;vector<int> a;cin >> n;a.resize(n); rep(i,n) cin >> a[i];cout << f(0, 30, a) << endl;}