제출 #391829

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
391829		balbit	케이크 (CEOI14_cake)	C++14	0 / 100	2084 ms	6688 KiB

cake

#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define pii pair<int, int>
#define f first
#define s second

#define ALL(x) (x).begin(), (x).end()
#define SZ(x) (int)((x).size())
#define pb push_back
#define MN(a,b) a = min(a,b)
#define REP(i,n) for (int i = 0; i<n; ++i)
#define REP1(i,n) for (int i = 1; i<=n; ++i)

#ifdef BALBIT
#define bug(...) cerr<<"#"<<__LINE__<<" "<<#__VA_ARGS__<<"- ", _do(__VA_ARGS__)
template<typename T> void _do( T && x) {cerr<<x<<endl;}
template<typename T, typename ...S> void _do( T && x, S && ...y) {cerr<<x<<", "; _do(y...);}
#else
#define bug(...)
#define endl '\n'
#endif // BALBIT

const int maxn = 250005;
const int inf = 1e9+8;
pii s[maxn*4];
pii a[maxn];

pii QU(int L, int R, int o=1, int l=0, int r=maxn-1) {
    if ( l> R || r < L) return {inf, -1};
    if (l>=L && r <= R) return s[o];
    int mid = (l+r)/2;
    return min(QU(L,R,o*2,l,mid), QU(L,R,o*2+1,mid+1,r));
}

void MO(int p, pii v, int o=1, int l=0, int r=maxn-1) {
    if (l > p || r < p) return;
    if( l == r) {
        s[o] = v; return;
    }
    int mid = (l+r)/2;
    MO(p,v,o*2,l,mid);
    MO(p,v,o*2+1,mid+1,r);
    s[o] = min(s[o*2], s[o*2+1]);
}

int bigger(int p, pii v, int o=1, int l=0, int r = maxn-1) {
    if (r < p || s[o] > v) return -1; // first thing geq v position >= p
    if (l == r) {
        return l;
    }
    int mid = (l+r)/2;
    if (l >= p) {
        if (s[o*2] <= v) return bigger(p,v,o*2,l,mid);
        else return bigger(p,v,o*2+1,mid+1,r);
    }else{
        int yy = bigger(p,v,o*2,l,mid);
        if (yy!=-1) return yy;
        return bigger(p,v,o*2+1,mid+1,r);
    }
}

int biggerl(int p, pii v, int o=1, int l=0, int r = maxn-1) {
//        bug(p,o,l,r);
    if (l > p || s[o] > v) return -1; // first thing geq v position <= p
    if (l == r) {
        return l;
    }
    int mid = (l+r)/2;
    if (r <= p) {
        if (s[o*2+1] <= v) return biggerl(p,v,o*2+1,mid+1,r);
        else return biggerl(p,v,o*2,l,mid);
    }else{
        int yy = biggerl(p,v,o*2+1,mid+1,r);
        if (yy!=-1) return yy;
        return biggerl(p,v,o*2,l,mid);
    }
}


signed main(){
    ios::sync_with_stdio(0), cin.tie(0);
    bug(1,2);
    int n,st; cin>>n>>st;
    MO(0, {0,-1});
    a[0] = {0,-1};
    REP1(i,n) {
        int y; cin>>y;
        a[i] = {n-y+1,inf};
        MO(i,a[i]);
    }
    a[n+1] = {0,-1};
    MO(n+1,{0,-1});
    int q; cin>>q;
    while (q--) {
        char c; cin>>c;
        int i; cin>>i;
        if (c == 'F') {
            if (st == i) cout<<0<<endl;
            else{
                int L = i, R = i<st?st-1:st+1;
                if (L>R) swap(L,R);
//                pii hi = QU(L,R);
                pii hi = {inf, 1000000};
//                bug(hi.f, hi.s);
                int x;
                if (i<st) {
                    for (int j = i; j<st; ++j) {
                        MN(hi, a[j]);
                    }
                    for (int j = st+1; ; ++j) {
                        if (a[j] < hi) {
                            x=j; break;
                        }
                    }
//                    x = bigger(st+1,hi);
                }else{
                    for (int j = i; j>st; --j) {
                        MN(hi, a[j]);
                    }
                    for (int j = st-1;; --j) {
                        if (a[j] < hi) {
                            x = j; break;
                        }
                    }
//                    x = biggerl(st-1,hi);
                }
//                bug(x);
                cout<<abs(x-i)-1<<'\n';

            }
        }else{
            int e; cin>>e;
            a[i] = {e,q};
            MO(i,{e,q});
        }
    }

}

• Subtask 1: 0 / 15
• Subtask 2: 0 / 15
• Subtask 3: 0 / 20
• Subtask 4: 0 / 50