제출 #770652

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
770652		hafo	벽 (IOI14_wall)	C++14	100 / 100	668 ms	113128 KiB

wall

#include <bits/stdc++.h>
#define ll long long
#define ull unsigned ll
#define pb push_back
#define pa pair<int, int>
#define pall pair<ll, int>
#define fi first
#define se second
#define TASK "test"
#define Size(x) (int) x.size()
#define all(x) x.begin(), x.end()
using namespace std;

template<typename T1, typename T2> bool mini (T1 &a, T2 b) {if(a > b) a = b; else return 0; return 1;}
template<typename T1, typename T2> bool maxi (T1 &a, T2 b) {if(a < b) a = b; else return 0; return 1;}

const int MOD = 1e9 + 7;
const int LOG = 20;
const int maxn = 2e6 + 7;
const ll oo = 1e9 + 69;

int n, k, op[maxn], l[maxn], r[maxn], height[maxn], ans[maxn];

struct ST {
    struct node {
        int val;
    }; 
    
    node st[4 * maxn];
    pa lz[4 * maxn];

    void init() {
        for(int id = 1; id <= 4 * n; id++) {
            st[id].val = 0;
            lz[id] = {-oo, oo};
        }
    }

    void fix(int id, int l, int r, int type) {
        if(type == 1) {
            maxi(st[id].val, lz[id].fi);
        } else {
            mini(st[id].val, lz[id].se);
        }
        if(l != r) {
            if(type == 1) {
                maxi(lz[id << 1].fi, lz[id].fi);
                maxi(lz[id << 1].se, lz[id].fi);
                maxi(lz[id << 1 | 1].fi, lz[id].fi);
                maxi(lz[id << 1 | 1].se, lz[id].fi);
            } else {
                mini(lz[id << 1].fi, lz[id].se);
                mini(lz[id << 1].se, lz[id].se);
                mini(lz[id << 1 | 1].fi, lz[id].se);
                mini(lz[id << 1 | 1].se, lz[id].se);
            }
        }
        if(type == 1) lz[id].fi = -oo;
        else lz[id].se = oo;
    }

    void update(int id, int l, int r, int u, int v, int val, int type) {
        fix(id, l, r, 0);
        fix(id, l, r, 1);
        if(r < u || l > v) return;
        if(u <= l && r <= v) {
            if(type == 1) {
                maxi(lz[id].fi, val);
                maxi(lz[id].se, val);
            } else {
                mini(lz[id].fi, val);
                mini(lz[id].se, val);
            }
            fix(id, l, r, type);
            return;
        }
        int mid = l + r >> 1;
        update(id << 1, l, mid, u, v, val, type);
        update(id << 1 | 1, mid + 1, r, u, v, val, type);
    }

    void get(int id, int l, int r) {
        fix(id, l, r, 0);
        fix(id, l, r, 1);
        if(l == r) {
            ans[l] = st[id].val;
            return;
        }
        int mid = l + r >> 1;
        get(id << 1, l, mid);
        get(id << 1 | 1, mid + 1, r);
    }
} st;

void buildWall(int n, int k, int op[], int left[], int right[], int height[], int finalHeight[]) {
    st.init();
    for(int i = 0; i < k; i++) {
        st.update(1, 1, n, left[i] + 1, right[i] + 1, height[i], op[i]);
    }
    st.get(1, 1, n);
    for(int i = 0; i < n; i++) {
        finalHeight[i] = ans[i + 1];
    }
}

컴파일 시 표준 에러 (stderr) 메시지

wall.cpp: In member function 'void ST::update(int, int, int, int, int, int, int)':
wall.cpp:77:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   77 |         int mid = l + r >> 1;
      |                   ~~^~~
wall.cpp: In member function 'void ST::get(int, int, int)':
wall.cpp:89:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   89 |         int mid = l + r >> 1;
      |                   ~~^~~

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