제출 #894042

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
894042		raul2008487	벽 (IOI14_wall)	C++17	61 / 100	1265 ms	262144 KiB

wall

#include<bits/stdc++.h>
#include "wall.h"
#define ll long long
#define vl vector<ll>
#define pll pair<ll,ll>
#define in insert
#define fi first
#define se second
#define all(v) v.begin(), v.end()
using namespace std;
const int sz = 2e6+6;
const ll dh = 1e9;
vector<array<ll, 2>> st(sz<<2), res(sz);
bool last[sz];
void comp(ll x1, ll x2){
    if(st[x1][0] > st[x2][1]){
        st[x2] = {st[x1][0], st[x1][0]};
    }
    else if(st[x1][1] < st[x2][0]){
        st[x2] = {st[x1][1], st[x1][1]};
    }
    else{
        st[x2] = {max(st[x1][0], st[x2][0]), min(st[x1][1], st[x2][1])};
    }
}
void push(ll v, ll l, ll r){
    if(l == r){return ;}
    comp(v, v*2);
    comp(v, v*2+1);
    st[v] = {0, dh};
}
void build(ll v, ll l, ll r){
    if(l == r){
        last[v] = 1;
        res[v] = {0, 0};
        return ;
    }
    ll m = (l + r)>>1;
    build(v*2, l, m);
    build(v*2+1, m+1, r);
}
void update(ll v, ll tl, ll tr, ll l, ll r, ll val, ll  type){
    if(max(l, tl) > min(r, tr)){return ;}
    push(v, tl, tr);
    if(tl >= l && tr <= r){
        if(last[v]){
            if(type == 1){
                st[v][0] = max(st[v][0], val);
                st[v][1] = max(st[v][1], val);
            }
            else{
                st[v][0] = min(st[v][0], val);
                st[v][1] = min(st[v][1], val);
            }
            return ;
        }
        if(type == 1){
            st[v] = {val, dh};
        }
        else{
            st[v] = {0, val};
        }
        push(v, tl, tr);
        return ;
    }
    ll tm = (tl+tr)>>1;
    update(v*2, tl, tm, l, r, val, type);
    update(v*2+1, tm+1, tr, l, r, val, type);
}
void trav(ll v, ll tl, ll tr){
    if(tl == tr){
        res[tl] = st[v];
        return ;
    }
    push(v, tl, tr);
    ll tm = (tl + tr)>>1;
    trav(v*2, tl, tm);
    trav(v*2+1, tm+1, tr);
}
void buildWall(int n, int k, int op[], int left[], int right[], int height[], int finalHeight[]){
    ll i, j, z = 0;
    for(i=0;i<=(n<<2);i++){
        st[i] = {0, dh};
    }
    build(1, 0, n-1);
    for(i=0;i<k;i++){
        update(1, 0, n-1, left[i], right[i], height[i], op[i]);
    }
    trav(1, 0, n-1);
    for(i=0;i<n;i++){
        finalHeight[i] = res[i][0];
    }
}

/*
10 6
1 1 8 4
0 4 9 1
0 3 6 5
1 0 5 3
1 2 2 5
0 6 7 0
*/

컴파일 시 표준 에러 (stderr) 메시지

wall.cpp: In function 'void buildWall(int, int, int*, int*, int*, int*, int*)':
wall.cpp:81:11: warning: unused variable 'j' [-Wunused-variable]
   81 |     ll i, j, z = 0;
      |           ^
wall.cpp:81:14: warning: unused variable 'z' [-Wunused-variable]
   81 |     ll i, j, z = 0;
      |              ^

• Subtask 1: 8 / 8
• Subtask 2: 24 / 24
• Subtask 3: 29 / 29
• Subtask 4: 0 / 39