oj.uz

Submission #1007615

# Submission time Handle Problem Language Result Execution time Memory
1007615 2024-06-25T09:23:28 Z farrellw Wall (IOI14_wall) C++14
100 / 100
 389 ms 48916 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[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)>>1;
        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) {
            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, 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]);
        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 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 604 KB Output is correct
5 Correct 3 ms 604 KB Output is correct
6 Correct 3 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 83 ms 8272 KB Output is correct
3 Correct 96 ms 4256 KB Output is correct
4 Correct 317 ms 10576 KB Output is correct
5 Correct 154 ms 10576 KB Output is correct
6 Correct 142 ms 10576 KB Output is correct

Subtask #3
29.0 / 29.0

# 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 604 KB Output is correct
5 Correct 2 ms 604 KB Output is correct
6 Correct 2 ms 800 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 76 ms 8256 KB Output is correct
9 Correct 86 ms 4176 KB Output is correct
10 Correct 309 ms 10580 KB Output is correct
11 Correct 171 ms 10580 KB Output is correct
12 Correct 145 ms 10580 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 81 ms 8096 KB Output is correct
15 Correct 20 ms 1372 KB Output is correct
16 Correct 334 ms 10580 KB Output is correct
17 Correct 159 ms 10472 KB Output is correct
18 Correct 175 ms 10580 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 5 ms 604 KB Output is correct
5 Correct 4 ms 600 KB Output is correct
6 Correct 2 ms 604 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 72 ms 8080 KB Output is correct
9 Correct 92 ms 4256 KB Output is correct
10 Correct 313 ms 10580 KB Output is correct
11 Correct 152 ms 10668 KB Output is correct
12 Correct 154 ms 10576 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 81 ms 8108 KB Output is correct
15 Correct 20 ms 1368 KB Output is correct
16 Correct 309 ms 10580 KB Output is correct
17 Correct 154 ms 10616 KB Output is correct
18 Correct 160 ms 10576 KB Output is correct
19 Correct 355 ms 48724 KB Output is correct
20 Correct 352 ms 48728 KB Output is correct
21 Correct 346 ms 48720 KB Output is correct
22 Correct 329 ms 48724 KB Output is correct
23 Correct 354 ms 48784 KB Output is correct
24 Correct 335 ms 48724 KB Output is correct
25 Correct 332 ms 48696 KB Output is correct
26 Correct 384 ms 48724 KB Output is correct
27 Correct 380 ms 48916 KB Output is correct
28 Correct 389 ms 48724 KB Output is correct
29 Correct 347 ms 48724 KB Output is correct
30 Correct 349 ms 48748 KB Output is correct