Submission #894582

#	Time	Username	Problem	Language	Result	Execution time	Memory
894582		raul2008487	Wall (IOI14_wall)	C++17	100 / 100	585 ms	177636 KiB

wall

/* R */
#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 ll sz = 2e6+6;
const ll inf = 1000000000000000;
vector<array<ll, 2>> st;
ll res[sz];
void comp(ll x1, ll x2){
    st[x2][0] = min(st[x1][1], max(st[x2][0], st[x1][0]));
    st[x2][1] = max(st[x1][0], min(st[x2][1], st[x1][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, inf};
}
void update(ll v, ll tl, ll tr, ll l, ll r, ll val, ll  type){
    if(tl > r || tr <l){return ;}
    if(tl >= l && tr <= r){
        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 ;
    }
    push(v, tl, tr);
    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 - 1] = st[v][0];
        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;
    st.assign(sz*4, {0, inf});
    for(i=0;i<k;i++){
        update(1, 1, n, left[i] + 1, right[i] + 1, height[i], op[i]);
    }
    trav(1, 1, n);
    for(i=0;i<n;i++){
        //cout << res[i] << ' ';
        finalHeight[i] = max(z, res[i]);
    }
}

/*
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

*/

Compilation message (stderr)

wall.cpp: In function 'void buildWall(int, int, int*, int*, int*, int*, int*)':
wall.cpp:55:11: warning: unused variable 'j' [-Wunused-variable]
   55 |     ll i, j, z = 0;
      |           ^

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