結果

問題 No.5002 stick xor
ユーザー ts_ts_
提出日時 2018-05-28 18:21:06
言語 C++11
(gcc 11.4.0)
結果
AC  
実行時間 986 ms / 1,000 ms
コード長 5,473 bytes
コンパイル時間 34,719 ms
実行使用メモリ 1,576 KB
スコア 45,927
最終ジャッジ日時 2018-05-28 18:22:00
ジャッジサーバーID
(参考情報)
judge8 /
純コード判定しない問題か言語
このコードへのチャレンジ
(要ログイン)

テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 982 ms
1,572 KB
testcase_01 AC 983 ms
1,572 KB
testcase_02 AC 984 ms
1,576 KB
testcase_03 AC 986 ms
1,572 KB
testcase_04 AC 984 ms
1,572 KB
testcase_05 AC 984 ms
1,572 KB
testcase_06 AC 984 ms
1,576 KB
testcase_07 AC 984 ms
1,576 KB
testcase_08 AC 984 ms
1,576 KB
testcase_09 AC 983 ms
1,572 KB
testcase_10 AC 984 ms
1,572 KB
testcase_11 AC 984 ms
1,572 KB
testcase_12 AC 982 ms
1,576 KB
testcase_13 AC 984 ms
1,572 KB
testcase_14 AC 984 ms
1,572 KB
testcase_15 AC 984 ms
1,572 KB
testcase_16 AC 984 ms
1,576 KB
testcase_17 AC 984 ms
1,576 KB
testcase_18 AC 984 ms
1,576 KB
testcase_19 AC 984 ms
1,568 KB
testcase_20 AC 984 ms
1,568 KB
testcase_21 AC 984 ms
1,576 KB
testcase_22 AC 984 ms
1,576 KB
testcase_23 AC 984 ms
1,576 KB
testcase_24 AC 983 ms
1,572 KB
testcase_25 AC 984 ms
1,576 KB
testcase_26 AC 984 ms
1,572 KB
testcase_27 AC 984 ms
1,572 KB
testcase_28 AC 984 ms
1,572 KB
testcase_29 AC 984 ms
1,572 KB
testcase_30 AC 984 ms
1,576 KB
testcase_31 AC 984 ms
1,576 KB
権限があれば一括ダウンロードができます

ソースコード

diff #

#include <bits/stdc++.h>
using namespace std;
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define rep(i,n)   FOR(i,0,n)
#define pb emplace_back
typedef long long ll;
typedef pair<int,int> pint;

unsigned long xor128(){
    static unsigned long x=123456789,y=362436069,z=521288629,w=88675123;
    unsigned long t=(x^(x<<11));
    x=y;y=z;z=w;
    return (w=(w^(w>>19))^(t^(t>>8)));
}
double timeLimit=0.91;
const int64_t CYCLES_PER_SEC=2800000000;
struct Timer {
	int64_t start;
	Timer() { reset(); }
	void reset() { start = getCycle(); }
	void plus(double a) { start -= (a * CYCLES_PER_SEC); }
	inline double get() { return (double)(getCycle() - start) / CYCLES_PER_SEC; }
	inline int64_t getCycle() {
		uint32_t low, high;
		__asm__ volatile ("rdtsc" : "=a" (low), "=d" (high));
		return ((int64_t)low) | ((int64_t)high << 32);
	}
};
int n,k;
int L[501];
string s[60];
bool g[60][60],g2[60][60];
vector<pair<pint,pint> > ans(500);
int lx,rx,ly,ry;
int best,sub;
int sumx[61][61],sumy[61][61];
pair<pint,pint> calc(int length){
    pair<pint,pint> ret;
    pint best={-1000100010,0};
    pint score;
    int slide=1;
    rep(i,n)rep(j,n-length+1)if(g[i][j]|g[i][j+length-1]){
        score={0,0};
        slide=1;
        while(j-slide>=0&&g[i][j-slide]^g[i][j]&&slide<3) ++score.second,++slide;
        slide=length;
        while(j+slide<n&&g[i][j+slide]^g[i][j+length-1]&&slide<2+length) ++score.second,++slide;
        rep(k,length){
            g[i][j+k]?++score.first:--score.first;
            if(k>0&&g[i][j+k-1]^g[i][j+k]) --score.second;
            
            if(i-1>=0&&g[i][j+k]^g[i-1][j+k]) ++score.second;
            if(i+1<n&&g[i][j+k]^g[i+1][j+k]) ++score.second;
            
        }
        if(best<score){
            ret=make_pair(pint(i+1,j+1),pint(i+1,j+length));
            best=score;
        }
    }
    rep(i,n)rep(j,n-length+1)if(g[j][i]|g[j+length-1][i]){
        score={0,0};
        slide=1;
        while(j-slide>=0&&g[j-slide][i]^g[j][i]&&slide<3) ++score.second,++slide;
        slide=length;
        while(j+slide<n&&g[j+slide][i]^g[j+length-1][i]&&slide<2+length) ++score.second,++slide;
        rep(k,length){
            g[j+k][i]?++score.first:--score.first;
            if(k>0&&g[j+k-1][i]^g[j+k][i]) --score.second;
            
            if(i-1>=0&&g[j+k][i]^g[j+k][i-1]) ++score.second;
            if(i+1<n&&g[j+k][i]^g[j+k][i+1]) ++score.second;
            
        }
        if(best<score){
            ret=make_pair(pint(j+1,i+1),pint(j+length,i+1));
            best=score;
        }
    }
    ly=ret.first.first,lx=ret.first.second,ry=ret.second.first,rx=ret.second.second;
    if(ly==ry)FOR(j,lx,rx+1) g[ly-1][j-1]^=1;
    else FOR(i,ly,ry+1) g[i-1][lx-1]^=1;
    return ret;
}
pair<pint,pint> calc2(int length){
    pair<pint,pint> ret;
    int best=-1000100010;
    int slide=1;
    rep(i,n)rep(j,n){
        sumx[i][j+1]=sumx[i][j]+g[i][j];
        sumy[i+1][j]=sumy[i][j]+g[i][j];
    }
    rep(i,n-length+1)rep(j,n-length+1)if(g[i][j]){
        int score=sumx[i][j+length]-sumx[i][j];
        if(best<score){
            ret=make_pair(pint(i+1,j+1),pint(i+1,j+length));
            best=score;
        }
        score=sumy[i+length][j]-sumy[i][j];
        if(best<score){
            ret=make_pair(pint(i+1,j+1),pint(i+length,j+1));
            best=score;
        }
    }
    FOR(i,n-length+1,n)rep(j,n-length+1){
        if(g[i][j]){
            int score=sumx[i][j+length]-sumx[i][j];
            if(best<score){
                ret=make_pair(pint(i+1,j+1),pint(i+1,j+length));
                best=score;
            }
        }
        if(g[j][i]){
            int score=sumy[j+length][i]-sumy[j][i];
            if(best<score){
                ret=make_pair(pint(j+1,i+1),pint(j+length,i+1));
                best=score;
            }
        }
    }
    ly=ret.first.first,lx=ret.first.second,ry=ret.second.first,rx=ret.second.second;
    if(ly==ry)FOR(j,lx,rx+1) g[ly-1][j-1]^=1,sub+=g[ly-1][j-1]?-1:1;
    else FOR(i,ly,ry+1) g[i-1][lx-1]^=1,sub+=g[i-1][lx-1]?-1:1;
    return ret;
}
int get_score(){
    int ret=0;
    rep(i,n)ret+=count(g[i],g[i]+n,0);
    return ret;
}
int main(){
    Timer timer;
    timer.reset();
    cin>>n>>k;
    rep(i,k) cin>>L[i];
    //sort(L,L+k,greater<pint>());
    rep(i,n) cin>>s[i];
    rep(i,n)rep(j,n) g[i][j]|=s[i][j]-'0';
    rep(i,k) ans[i]=calc(L[i]);
    best=get_score();
    memcpy(g2,g,sizeof(g));
    int id,num=4;
    vector<pint> cnd(num);
    vector<pair<pint,pint> >tmp(num);
    double t;
    while(1){
        t=timer.get();
        if(t>timeLimit) break;
        if(t>timeLimit-0.2) num=3;
        sub=0;
        rep(l,num){
            while(id=xor128()%k,count(cnd.begin(),cnd.begin()+l,pint(L[id],id))||L[id]==1);
            cnd[l]={L[id],id};
            ly=ans[id].first.first,lx=ans[id].first.second,ry=ans[id].second.first,rx=ans[id].second.second;
            if(ly==ry)FOR(j,lx,rx+1) g[ly-1][j-1]^=1,sub+=g[ly-1][j-1]?-1:1;
            else FOR(i,ly,ry+1) g[i-1][lx-1]^=1,sub+=g[i-1][lx-1]?-1:1;
        }
        rep(i,num){
            tmp[i]=calc2(cnd[i].first);
        }
        if(sub>=0){
            best+=sub;
            memcpy(g2,g,sizeof(g));
            rep(i,num)ans[cnd[i].second]=tmp[i];
        }
        else memcpy(g,g2,sizeof(g2));
    }
    //cerr<<best<<endl;
    rep(i,k){
        cout<<ans[i].first.first<<" "<<ans[i].first.second<<" "<<ans[i].second.first<<" "<<ans[i].second.second<<endl;
    }
    return 0;
}
0