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답안 #283852

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
283852 2020-08-26T08:08:39 Z 최은수(#5746) Ruka (COI15_ruka) C++17
100 / 100
 534 ms 14684 KB 
#include<iostream>
#include<vector>
#include<algorithm>
#define ep emplace
#define eb emplace_back
#define fi first
#define se second
#define all(x) (x).begin(),(x).end()
using namespace std;
typedef long long ll;
typedef pair<int,int>pi;
typedef pair<ll,ll>pl;
const int inf=1e9+7;
const ll INF=1e18;
const int mx=100010;
struct seg
{
    vector<int>t;
    void init(int n)
    {
        t.resize(n*4,0);
        return;
    }
    void upd(int n,int s,int e,int S,int E,int p)
    {
        if(S>E)
            return upd(n,s,e,E,S,p);
        if(s>E||S>e)
            return;
        if(S<=s&&e<=E)
        {
            t[n]+=p;
            return;
        }
        int m=s+(e-s)/2;
        upd(n*2,s,m,S,E,p);
        upd(n*2+1,m+1,e,S,E,p);
        return;
    }
    int query(int n,int s,int e,int x)
    {
        if(s==e)
            return t[n];
        int m=s+(e-s)/2;
        int dans=0;
        if(x>m)
            dans=query(n*2+1,m+1,e,x);
        else
            dans=query(n*2,s,m,x);
        return t[n]+dans;
    }
}stxl,stxr,styl,styr;
int xoff,yoff;
int x[mx],y[mx];
int prvx[mx],prvy[mx];
int cox[mx],coy[mx];
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int n;
    cin>>n;
    for(int i=0;i++<n;)
        cin>>x[i]>>y[i],prvx[i]=x[i],prvy[i]=y[i];
    vector<int>xcv,ycv;
    xcv.eb(0);
    ycv.eb(0);
    xcv.eb(1);
    ycv.eb(1);
    cox[0]=coy[0]=1;
    for(int i=0;i++<n;)
        xcv.eb(cox[i]=cox[i-1]+x[i]),
        ycv.eb(coy[i]=coy[i-1]+y[i]);
    int cur=1;
    int q;
    cin>>q;
    vector<char>qv1;
    vector<pi>qv2;
    for(int qi=0;qi<q;qi++)
    {
        char c;
        cin>>c;
        qv1.eb(c);
        if(c=='B')
        {
            if(cur==1)
                continue;
            xcv.eb(cox[cur-1]=cox[cur]-x[cur]);
            ycv.eb(coy[cur-1]=coy[cur]-y[cur]);
            cur--;
        }
        else if(c=='F')
        {
            if(cur==n)
                continue;
            xcv.eb(cox[cur]=cox[cur-1]+x[cur]);
            ycv.eb(coy[cur]=coy[cur-1]+y[cur]);
            cur++;
        }
        else if(c=='C')
        {
            int nx,ny;
            cin>>nx>>ny;
            qv2.eb(nx,ny);
            xoff+=nx-x[cur];
            yoff+=ny-y[cur];
            x[cur]=nx;
            y[cur]=ny;
        }
        else
        {
            xcv.eb(-xoff);
            ycv.eb(-yoff);
            xcv.eb(cox[cur-1]+x[cur]);
            ycv.eb(coy[cur-1]+y[cur]);
        }
    }
    sort(all(xcv));
    xcv.erase(unique(all(xcv)),xcv.end());
    sort(all(ycv));
    ycv.erase(unique(all(ycv)),ycv.end());
    int xn=xcv.size(),yn=ycv.size();
    stxl.init(xn),stxr.init(xn);
    styl.init(yn),styr.init(yn);
    auto ubx=[&](const int&x){return(int)(upper_bound(all(xcv),x)-xcv.begin());};
    auto uby=[&](const int&x){return(int)(upper_bound(all(ycv),x)-ycv.begin());};
    cox[0]=coy[0]=1;
    for(int i=0;i++<n;)
        cox[i]=cox[i-1]+(x[i]=prvx[i]),
        coy[i]=coy[i-1]+(y[i]=prvy[i]);
    for(int i=1;i++<n;)
        stxr.upd(1,1,xn,ubx(cox[i-1]),ubx(cox[i]),1),
        styr.upd(1,1,yn,uby(coy[i-1]),uby(coy[i]),1);
    xoff=yoff=0;
    cur=1;
    for(int qi=0,qi2=0;qi<q;qi++)
    {
        char c=qv1[qi];
        if(c=='B')
        {
            if(cur==1)
                continue;
            stxl.upd(1,1,xn,ubx(cox[cur-2]),ubx(cox[cur-1]),-1);
            styl.upd(1,1,yn,uby(coy[cur-2]),uby(coy[cur-1]),-1);
            cox[cur-1]=cox[cur]-x[cur];
            coy[cur-1]=coy[cur]-y[cur];
            cur--;
            stxr.upd(1,1,xn,ubx(cox[cur]),ubx(cox[cur+1]),1);
            styr.upd(1,1,yn,uby(coy[cur]),uby(coy[cur+1]),1);
        }
        else if(c=='F')
        {
            if(cur==n)
                continue;
            stxr.upd(1,1,xn,ubx(cox[cur]),ubx(cox[cur+1]),-1);
            styr.upd(1,1,yn,uby(coy[cur]),uby(coy[cur+1]),-1);
            cox[cur]=cox[cur-1]+x[cur];
            coy[cur]=coy[cur-1]+y[cur];
            cur++;
            stxl.upd(1,1,xn,ubx(cox[cur-2]),ubx(cox[cur-1]),1);
            styl.upd(1,1,yn,uby(coy[cur-2]),uby(coy[cur-1]),1);
        }
        else if(c=='C')
        {
            int nx=qv2[qi2].fi,ny=qv2[qi2].se;
            qi2++;
            xoff+=nx-x[cur];
            yoff+=ny-y[cur];
            x[cur]=nx;
            y[cur]=ny;
        }
        else
        {
            int nx=cox[cur-1]+x[cur],ny=coy[cur-1]+y[cur];
            int xct=((cox[cur-1]>0)==(nx>0)?0:1);
            int yct=((coy[cur-1]>0)==(ny>0)?0:1);
            xct+=stxl.query(1,1,xn,ubx(0))+stxr.query(1,1,xn,ubx(-xoff));
            yct+=styl.query(1,1,yn,uby(0))+styr.query(1,1,yn,uby(-yoff));
            cout<<(xct+yct)<<'\n';
        }
    }
    return 0;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 512 KB Output is correct
3 Correct 2 ms 512 KB Output is correct
4 Correct 2 ms 512 KB Output is correct

Subtask #2
35.0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 512 KB Output is correct
3 Correct 2 ms 512 KB Output is correct
4 Correct 2 ms 512 KB Output is correct
5 Correct 167 ms 5604 KB Output is correct
6 Correct 112 ms 4584 KB Output is correct
7 Correct 129 ms 6244 KB Output is correct
8 Correct 132 ms 6244 KB Output is correct

Subtask #3
56.0 / 56.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 512 KB Output is correct
3 Correct 2 ms 512 KB Output is correct
4 Correct 2 ms 512 KB Output is correct
5 Correct 167 ms 5604 KB Output is correct
6 Correct 112 ms 4584 KB Output is correct
7 Correct 129 ms 6244 KB Output is correct
8 Correct 132 ms 6244 KB Output is correct
9 Correct 397 ms 12888 KB Output is correct
10 Correct 534 ms 14684 KB Output is correct
11 Correct 421 ms 13524 KB Output is correct
12 Correct 416 ms 12880 KB Output is correct