제출 #1015708

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1015708		dpsaveslives	벽 (IOI14_wall)	C++17	100 / 100	358 ms	59224 KiB

wall

#include <bits/stdc++.h>
#define f first
#define s second
using namespace std;

const int MAXN = 1<<22;
pair<int,int> segtree[MAXN];
const int INF = 2e9+20;
int N;
void build(int l = 0, int r = N-1, int p = 1){
    if(l == 0 && r == N-1){
        segtree[p].f = segtree[p].s = 0;
    }
    else{
        segtree[p].f = -INF; segtree[p].s = INF;
    }
    if(l == r){
        return;
    }
    int mid = (l+r)>>1;
    build(l,mid,p<<1); build(mid+1,r,(p<<1)|1);
}
void push(int p, pair<int,int> newval){
    if(newval.s < segtree[p].f){
        segtree[p] = {newval.s,newval.s};
        return;
    }
    if(segtree[p].s < newval.f){
        segtree[p] = {newval.f,newval.f};
        return;
    }
    segtree[p] = {max(newval.f,segtree[p].f),min(newval.s,segtree[p].s)};
}
void upd(int tarl, int tarr, pair<int,int> val, int l = 0, int r = N-1, int p = 1){
    if(r < tarl || l > tarr) return;
    if(tarl <= l && r <= tarr){
        push(p,val);
        return;
    }
    int mid = (l+r)>>1;
    if(l != r){
        if(segtree[p].f != -INF || segtree[p].s != INF){
            push((p<<1),segtree[p]); push((p<<1)|1,segtree[p]);
            segtree[p].f = -INF; segtree[p].s = INF;
        }
    }
    upd(tarl,tarr,val,l,mid,p<<1); upd(tarl,tarr,val,mid+1,r,(p<<1)|1);
}
void query(int* ans, int l = 0, int r = N-1, int p = 1){
    if(l == r){
        ans[l] = segtree[p].f;
        return;
    }
    else if(segtree[p].f != -INF || segtree[p].s != INF){
        push((p<<1),segtree[p]); push((p<<1)|1,segtree[p]);
        segtree[p].f = -INF; segtree[p].s = INF;
    }
    int mid = (l+r)>>1;
    query(ans,l,mid,p<<1); query(ans,mid+1,r,(p<<1)|1);

}
void buildWall(int n, int k, int op[], int left[], int right[], int height[], int finalHeight[]){
    N = n;
    build();
    for(int i = 0;i<k;++i){
        if(op[i] == 1){
            pair<int,int> val; val.s = INF; val.f = height[i];
            upd(left[i],right[i],val);
        }
        else{
            pair<int,int> val; val.f = -INF; val.s = height[i];
            upd(left[i],right[i],val);
        }
    }
    query(finalHeight);
}

• Subtask 1: 8 / 8
• Subtask 2: 24 / 24
• Subtask 3: 29 / 29
• Subtask 4: 39 / 39