oj.uz

Submission #1006593

# Submission time Handle Problem Language Result Execution time Memory
1006593 2024-06-24T04:43:08 Z farrellw Wall (IOI14_wall) C++17
100 / 100
 409 ms 54352 KB 
#pragma GCC optimize("O1,O2,O3,Ofast,unroll-loops")

#include <bits/stdc++.h>
using namespace std;

#define fi first
#define se second
#define pb push_back
#define INF 1000000
typedef long long ll;
typedef pair<int, int> ii;
typedef vector<int> vi;
typedef vector<ii> vii;

#include "wall.h"

ii combine(ii upd_new, ii upd_old) {    // apply upd_new to upd_old
    //cout << "combining " << upd_new.fi << " " << upd_new.se << " on top of " << upd_old.fi << " " << upd_old.se << endl;
    ii res = {max(upd_new.fi, upd_old.fi), min(upd_new.se, upd_old.se)};
    if (res.fi > res.se) {
        if (upd_old.se < upd_new.se) // The ranges are disjoint, so suffices to check either
            res = {upd_new.fi, upd_new.fi};
        else
            res = {upd_new.se, upd_new.se};
    }
    //cout << "result is " << res.fi << " " << res.se << endl;
    return res;
}

struct Segtree {    // Segtree of updates
    int sz;
    vector<ii> upd;    // store (a, b)
    Segtree(int N) {
        sz = 1;
        while (sz < N)
            sz *= 2;
        upd = vii(2 * sz, {0, INF});
    }
    void push(int id, int left, int right) { // O(1), for regular updates
        if (right - left == 1)
            return;
        upd[2 * id + 1] = combine(upd[id], upd[2 * id + 1]);
        upd[2 * id + 2] = combine(upd[id], upd[2 * id + 2]);
        upd[id] = {0, INF};
    }

    void push_recursive(int id, int left, int right) { // O(N), only for answer extraction at the end
        if(right - left == 1)
            return;
        push(id, left, right);
        int mid = (left + right) / 2;
        push_recursive(2 * id + 1, left, mid);
        push_recursive(2 * id + 2, mid, right);
    }

    void range_upd(int qleft, int qright, ii val, int id, int left, int right) {
        if (qleft <= left && right <= qright) {
            //cout << "update " << id << " " << left << " " << right << " " << val.fi << " " << val.se << endl;
            upd[id] = combine(val, upd[id]);
            //cout << upd[id].fi << " " << upd[id].se << endl;
            return;
        }
        if (qright <= left || right <= qleft)
            return;
        push(id, left, right);
        int mid = (left + right) / 2;
        range_upd(qleft, qright, val, 2 * id + 1, left, mid);
        range_upd(qleft, qright, val, 2 * id + 2, mid, right);
    }
    void range_upd(int qleft, int qright, ii val) {
        range_upd(qleft, qright, val, 0, 0, sz);
    }
};

void buildWall(int n, int k, int op[], int left[], int right[], int height[], int finalHeight[]) {
    Segtree tree(n);
    for(int z = 0; z < k; z++) {
        ii upd_val = (op[z] == 1) ? make_pair(height[z], INF) : make_pair(0, height[z]);
        //cout << left[z] << " " << right[z]+1 << " " << upd_val.fi << " " << upd_val.se << "\n" << endl;
        tree.range_upd(left[z], right[z]+1, upd_val);

        /*for(int i = 0; i< n; i++) {
            cout << tree.upd[i].fi << " ";
        }
        cout << endl;*/
        
    }

    tree.push_recursive(0, 0, tree.sz);
    //cout << tree.sz << endl;
    for(int z = 0; z < n; z++) {
        finalHeight[z] = tree.upd[z+tree.sz-1].fi;
    }
    return;
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 600 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 2 ms 348 KB Output is correct
4 Correct 4 ms 860 KB Output is correct
5 Correct 3 ms 860 KB Output is correct
6 Correct 5 ms 860 KB Output is correct

Subtask #2
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 80 ms 11172 KB Output is correct
3 Correct 105 ms 6224 KB Output is correct
4 Correct 372 ms 15768 KB Output is correct
5 Correct 179 ms 15952 KB Output is correct
6 Correct 178 ms 15188 KB Output is correct

Subtask #3
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 572 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 4 ms 860 KB Output is correct
5 Correct 3 ms 860 KB Output is correct
6 Correct 5 ms 860 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 80 ms 11300 KB Output is correct
9 Correct 105 ms 6224 KB Output is correct
10 Correct 362 ms 15700 KB Output is correct
11 Correct 216 ms 15896 KB Output is correct
12 Correct 177 ms 15140 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 84 ms 11140 KB Output is correct
15 Correct 22 ms 1968 KB Output is correct
16 Correct 409 ms 15760 KB Output is correct
17 Correct 264 ms 15444 KB Output is correct
18 Correct 194 ms 15344 KB Output is correct

Subtask #4
39.0 / 39.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 444 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 4 ms 888 KB Output is correct
5 Correct 3 ms 860 KB Output is correct
6 Correct 3 ms 860 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 81 ms 11100 KB Output is correct
9 Correct 105 ms 6300 KB Output is correct
10 Correct 364 ms 15636 KB Output is correct
11 Correct 176 ms 15952 KB Output is correct
12 Correct 164 ms 15204 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 71 ms 11188 KB Output is correct
15 Correct 21 ms 1884 KB Output is correct
16 Correct 370 ms 15712 KB Output is correct
17 Correct 168 ms 15444 KB Output is correct
18 Correct 173 ms 15348 KB Output is correct
19 Correct 377 ms 54096 KB Output is correct
20 Correct 354 ms 54104 KB Output is correct
21 Correct 372 ms 54184 KB Output is correct
22 Correct 348 ms 54100 KB Output is correct
23 Correct 359 ms 54352 KB Output is correct
24 Correct 351 ms 54156 KB Output is correct
25 Correct 345 ms 54092 KB Output is correct
26 Correct 371 ms 54160 KB Output is correct
27 Correct 346 ms 54100 KB Output is correct
28 Correct 343 ms 54096 KB Output is correct
29 Correct 354 ms 54096 KB Output is correct
30 Correct 361 ms 54100 KB Output is correct