oj.uz

Submission #1007634

# Submission time Handle Problem Language Result Execution time Memory
1007634 2024-06-25T09:34:07 Z farrellw Wall (IOI14_wall) C++14
100 / 100
 418 ms 48856 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) { // O(1), for regular updates
        if (id+1 >= sz)
            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);
        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);
        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 95 ms 8020 KB Output is correct
3 Correct 103 ms 4180 KB Output is correct
4 Correct 340 ms 10576 KB Output is correct
5 Correct 173 ms 10580 KB Output is correct
6 Correct 176 ms 10572 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 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 77 ms 8092 KB Output is correct
9 Correct 99 ms 4176 KB Output is correct
10 Correct 365 ms 10576 KB Output is correct
11 Correct 162 ms 10664 KB Output is correct
12 Correct 152 ms 10576 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 85 ms 8120 KB Output is correct
15 Correct 21 ms 1372 KB Output is correct
16 Correct 365 ms 10464 KB Output is correct
17 Correct 189 ms 10576 KB Output is correct
18 Correct 165 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 4 ms 604 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 71 ms 8188 KB Output is correct
9 Correct 98 ms 4252 KB Output is correct
10 Correct 328 ms 10596 KB Output is correct
11 Correct 165 ms 10576 KB Output is correct
12 Correct 169 ms 10580 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 90 ms 8080 KB Output is correct
15 Correct 21 ms 1368 KB Output is correct
16 Correct 364 ms 10580 KB Output is correct
17 Correct 175 ms 10484 KB Output is correct
18 Correct 172 ms 10580 KB Output is correct
19 Correct 383 ms 48776 KB Output is correct
20 Correct 339 ms 48720 KB Output is correct
21 Correct 348 ms 48724 KB Output is correct
22 Correct 376 ms 48796 KB Output is correct
23 Correct 350 ms 48720 KB Output is correct
24 Correct 380 ms 48720 KB Output is correct
25 Correct 418 ms 48712 KB Output is correct
26 Correct 392 ms 48856 KB Output is correct
27 Correct 388 ms 48720 KB Output is correct
28 Correct 389 ms 48724 KB Output is correct
29 Correct 388 ms 48836 KB Output is correct
30 Correct 336 ms 48720 KB Output is correct