Submission #219217

#	Time	Username	Problem	Language	Result	Execution time	Memory
219217		summitwei	Wall (IOI14_wall)	C++17	100 / 100	942 ms	177800 KiB

wall

#include <bits/stdc++.h>
#include <wall.h>
using namespace std;
typedef vector<int> vi;
typedef vector<pair<int, int> > vpii;
typedef pair<int, int> pii;
typedef long long ll;
typedef pair<ll, ll> pll;
typedef pair<double, double> pdd;
typedef vector<ll> vll;
#define INF 0x3f3f3f3f
#define MOD 1000000009LL
#define EPSILON 0.00001
#define f first
#define s second
#define pb push_back
#define mp make_pair

#define FOR(i, a, b) for (ll i=(a); i<=(signed)(b); i++)
#define F0R(i, a) for (ll i=0; i<(signed)(a); i++)
#define RFOR(i, a, b) for (ll i=(a); i >= b; i--)

#define MN 2000005
struct Node{
    int l, r;
    int lzl, lzr;
    Node() : l(-INF), r(INF), lzl(-INF), lzr(INF) {}
};
void push(Node *a, int lr, int rr){
    if(a->l < lr) a->l = lr;
    if(a->l > rr) a->l = rr;
    if(a->r < lr) a->r = lr;
    if(a->r > rr) a->r = rr;
}
void add(Node *a, int lr, int rr){
    if(a->lzl < lr) a->lzl = lr;
    if(a->lzl > rr) a->lzl = rr;
    if(a->lzr < lr) a->lzr = lr;
    if(a->lzr > rr) a->lzr = rr;
}
Node tree[4*MN];
void upd(int node, int a, int b, int i, int j, int l, int r){
    if(a > j || b < i) return;
    if(i <= a && b <= j){
        add(tree+node, l, r);
        return;
    }
    push(tree+node, tree[node].lzl, tree[node].lzr);
    if(a != b){
        add(tree+node*2, tree[node].lzl, tree[node].lzr);
        add(tree+node*2+1, tree[node].lzl, tree[node].lzr);
    }
    tree[node].lzl = -INF; tree[node].lzr = INF;
    upd(node*2, a, (a+b)/2, i, j, l, r);
    upd(node*2+1, 1+(a+b)/2, b, i, j, l, r);
}
pii ans[MN];
void fin(int node, int a, int b){
    push(tree+node, tree[node].lzl, tree[node].lzr);
    if(a != b){
        add(tree+node*2, tree[node].lzl, tree[node].lzr);
        add(tree+node*2+1, tree[node].lzl, tree[node].lzr);
    } else{
        ans[a] = {tree[node].l, tree[node].r};
        return;
    }
    fin(node*2, a, (a+b)/2);
    fin(node*2+1, 1+(a+b)/2, b);
}
void pr(int node, int a, int b){
    cout << node << " " << a << " " << b << " " << tree[node].l << " " << tree[node].r << " " << tree[node].lzl << " " << tree[node].lzr << "\n";
    if(a != b){pr(node*2, a, (a+b)/2); pr(node*2+1, 1+(a+b)/2, b);}
}
void buildWall(int n, int k, int op[], int left[], int right[], int height[], int finalHeight[]){
    F0R(i, k){
        if(op[i] == 1){
            upd(1, 1, n, left[i]+1, right[i]+1, height[i], INF);
        } else{
            upd(1, 1, n, left[i]+1, right[i]+1, -INF, height[i]);
        }
        //pr(1, 1, n);
        //cout << "\n\n";
    }
    fin(1, 1, n);
    F0R(i, n){
        finalHeight[i] = max(0, ans[i+1].f);
    }
}

/*int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    int n, k;
    cin >> n >> k;
    int op[k], left[k], right[k], height[k], finalHeight[n];
    F0R(i, k) cin >> op[i] >> left[i] >> right[i] >> height[i];
    buildWall(n, k, op, left, right, height, finalHeight);
    F0R(i, n) cout << finalHeight[i] << " ";
    cout << "\n";
    
    return 0;
}*/

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