結果
| 問題 |
No.5001 排他的論理和でランニング
|
| ユーザー |
どらら
|
| 提出日時 | 2018-03-17 14:43:37 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 1,266 ms / 1,500 ms |
| コード長 | 3,843 bytes |
| コンパイル時間 | 1,499 ms |
| 実行使用メモリ | 7,484 KB |
| スコア | 52,428,749 |
| 最終ジャッジ日時 | 2020-03-12 20:09:43 |
|
ジャッジサーバーID (参考情報) |
judge9 / |
| 純コード判定しない問題か言語 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 50 |
ソースコード
#include <bits/stdc++.h>
#include <sys/time.h>
using namespace std;
#define REP(i,a,n) for(int i=(a); i<(int)(n); i++)
#define rep(i,n) REP(i,0,n)
#define FOR(it,c) for(__typeof((c).begin()) it=(c).begin(); it!=(c).end(); ++it)
#define ALLOF(c) (c).begin(), (c).end()
typedef long long ll;
typedef unsigned long long ull;
unsigned int xor128(){
static unsigned int x=123456789, y=362436069, z=521288629, w=88675123;
unsigned int t;
t=(x^(x<<11));
x=y; y=z; z=w;
return w=(w^(w>>19))^(t^(t>>8));
}
class Timer {
double start_time;
double getNow(){
struct timeval t;
gettimeofday(&t, NULL);
return t.tv_sec + t.tv_usec * 1e-6;
}
public:
void start(){
start_time = getNow();
}
double getSec(){
return getNow()-start_time;
}
};
vector<int> solve(const vector<int>& v, int N, int M){
Timer timer;
timer.start();
bitset<100005> w;
int score = 0;
rep(i,M){
w[i] = 1;
score ^= v[i];
}
int t = 0;
while(t<100){
/*
for(int i=22; i>=0; i--){
if((score>>i)&1) cout << 1;
else cout << 0;
}
cout << endl;
*/
int br = 22 - (t%23);
int th = 1<<(br+1);
vector<int> p1, p0;
vector<int> q1, q0;
rep(i,N){
if(v[i]>=th) continue;
if(w[i]){
if((v[i]>>br)&1) p1.push_back(i);
else p0.push_back(i);
}else{
if((v[i]>>br)&1) q1.push_back(i);
else q0.push_back(i);
}
if(p1.size()>1 && p0.size()>1 && q1.size()>1 && q0.size()>1) break;
}
if((score>>br)&1){
if(p1.size()>1 && q0.size()>1){
random_shuffle(ALLOF(p1));
random_shuffle(ALLOF(q0));
int t_score = score;
t_score ^= v[p1[0]];
t_score ^= v[p1[1]];
t_score ^= v[q0[0]];
t_score ^= v[q0[1]];
if(score <= t_score){
w[p1[0]] = 0;
w[p1[1]] = 0;
w[q0[0]] = 1;
w[q0[1]] = 1;
score ^= v[p1[0]];
score ^= v[p1[1]];
score ^= v[q0[0]];
score ^= v[q0[1]];
}
}
else if(p0.size()>1 && q1.size()>1){
int t_score = score;
t_score ^= v[p0[0]];
t_score ^= v[p0[1]];
t_score ^= v[q1[0]];
t_score ^= v[q1[1]];
if(score <= t_score){
w[p0[0]] = 0;
w[p0[1]] = 0;
w[q1[0]] = 1;
w[q1[1]] = 1;
score ^= v[p0[0]];
score ^= v[p0[1]];
score ^= v[q1[0]];
score ^= v[q1[1]];
}
}
}else{
if(p1.size()>0 && q0.size()>0){
w[p1[0]] = 0;
w[q0[0]] = 1;
score ^= v[p1[0]];
score ^= v[q0[0]];
}
else if(p0.size()>0 && q1.size()>0){
w[p0[0]] = 0;
w[q1[0]] = 1;
score ^= v[p0[0]];
score ^= v[q1[0]];
}
}
t++;
}
#ifdef LOCAL
cerr << score << endl;
for(int i=22; i>=0; i--){
if((score>>i)&1) cerr << 1;
else cerr << 0;
}
cerr << endl;
#endif
vector<int> ret;
rep(i,w.size()){
if(w[i]) ret.push_back(v[i]);
}
return ret;
}
int main(){
int N, M;
cin >> N >> M;
vector<int> v;
rep(i,N){
#ifdef LOCAL
v.push_back(1+i);
#else
int a;
cin >> a;
v.push_back(a);
#endif
}
int score = 0;
vector<int> ret;
Timer atimer;
atimer.start();
while(atimer.getSec()<1.2){
random_shuffle(ALLOF(v));
vector<int> res = solve(v, N, M);
int t_score = 0;
rep(i,M){
t_score ^= res[i];
}
if(score < t_score){
score = t_score;
ret = res;
}
}
#ifdef LOCAL
cerr << score << endl;
for(int i=22; i>=0; i--){
if((score>>i)&1) cerr << 1;
else cerr << 0;
}
cerr << endl;
#endif
#ifndef LOCAL
rep(i,ret.size()){
if(i>0) cout << " ";
cout << ret[i];
}
cout << endl;
#endif
return 0;
}
どらら