oj.uz

Submission #1007618

# Submission time Handle Problem Language Result Execution time Memory
1007618 2024-06-25T09:24:33 Z farrellw Wall (IOI14_wall) C++14
100 / 100
 364 ms 48888 KB 
#include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define INF 1000000
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
    ii res = {max(upd_new.fi, upd_old.fi), min(upd_new.se, upd_old.se)};
    if (res.fi > res.se) { // The ranges are disjoint, so suffices to check either
        res = (upd_old.se < upd_new.se) ? make_pair(upd_new.fi, upd_new.fi) : make_pair(upd_new.se, upd_new.se);
    }
    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[(id<<1)|1] = combine(upd[id], upd[(id<<1)|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)>>1;
        push_recursive((id<<1)|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) {
            upd[id] = combine(val, upd[id]);
            return;
        }
        if (qright <= left || right <= qleft)
            return;
        push(id, left, right);
        int mid = (left + right)>>1;
        range_upd(qleft, qright, val, (id<<1)|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]);
        tree.range_upd(left[z], right[z]+1, upd_val);
    }
    tree.push_recursive(0, 0, tree.sz);
    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 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 4 ms 604 KB Output is correct
5 Correct 3 ms 604 KB Output is correct
6 Correct 3 ms 600 KB Output is correct

Subtask #2
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 79 ms 8212 KB Output is correct
3 Correct 103 ms 4180 KB Output is correct
4 Correct 333 ms 10628 KB Output is correct
5 Correct 172 ms 10580 KB Output is correct
6 Correct 152 ms 10544 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 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 4 ms 604 KB Output is correct
5 Correct 3 ms 604 KB Output is correct
6 Correct 2 ms 604 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 78 ms 8260 KB Output is correct
9 Correct 102 ms 4176 KB Output is correct
10 Correct 347 ms 10676 KB Output is correct
11 Correct 168 ms 10576 KB Output is correct
12 Correct 163 ms 10576 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 88 ms 8020 KB Output is correct
15 Correct 20 ms 1456 KB Output is correct
16 Correct 325 ms 10576 KB Output is correct
17 Correct 172 ms 10580 KB Output is correct
18 Correct 179 ms 10480 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 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 4 ms 800 KB Output is correct
5 Correct 3 ms 604 KB Output is correct
6 Correct 3 ms 604 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 76 ms 8176 KB Output is correct
9 Correct 95 ms 4188 KB Output is correct
10 Correct 345 ms 10580 KB Output is correct
11 Correct 163 ms 10576 KB Output is correct
12 Correct 158 ms 10580 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 79 ms 8076 KB Output is correct
15 Correct 20 ms 1372 KB Output is correct
16 Correct 315 ms 10668 KB Output is correct
17 Correct 160 ms 10676 KB Output is correct
18 Correct 155 ms 10500 KB Output is correct
19 Correct 364 ms 48720 KB Output is correct
20 Correct 332 ms 48720 KB Output is correct
21 Correct 356 ms 48720 KB Output is correct
22 Correct 341 ms 48724 KB Output is correct
23 Correct 330 ms 48816 KB Output is correct
24 Correct 352 ms 48720 KB Output is correct
25 Correct 357 ms 48720 KB Output is correct
26 Correct 349 ms 48724 KB Output is correct
27 Correct 335 ms 48748 KB Output is correct
28 Correct 349 ms 48720 KB Output is correct
29 Correct 339 ms 48888 KB Output is correct
30 Correct 347 ms 48788 KB Output is correct