oj.uz

Submission #1007668

# Submission time Handle Problem Language Result Execution time Memory
1007668 2024-06-25T09:59:45 Z farrellw Wall (IOI14_wall) C++14
100 / 100
 414 ms 98136 KB 
#include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define INF 100005
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
        return (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)
    vi left;
    vi right;
    vi mid;
    Segtree(int N) {
        sz = 1;
        while (sz < N)
            sz *= 2;
        upd = vii(2 * sz, {0, INF});
        left = vi(2 * sz, 0);
        right = vi(2 * sz, 0);
        mid = vi(2 * sz, 0);
        for(int id = sz-1; id < 2*sz-1; id++) {
            left[id] = id-sz+1;
            right[id] = id-sz+2;
        }
        for(int id = sz-2; id >= 0; id--) {
            left[id] = left[(id<<1)|1];
            right[id] = right[2 * id + 2];
            mid[id] = (left[id] + right[id])>>1;
        }
    }
    void push(int id, int left, int right) { // O(1), for regular updates
        if (this->mid[id]) {
            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(this->mid[id]) {
            push(id, left, right);
            int mid = (left + right)>>1;
            push_recursive((id<<1)|1, left, mid);
            push_recursive(2 * id + 2, mid, right);
            return;
        }
    }
 
    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 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 1116 KB Output is correct
5 Correct 3 ms 1116 KB Output is correct
6 Correct 3 ms 1116 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 78 ms 8224 KB Output is correct
3 Correct 106 ms 5036 KB Output is correct
4 Correct 326 ms 13700 KB Output is correct
5 Correct 150 ms 13748 KB Output is correct
6 Correct 145 ms 13784 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 1116 KB Output is correct
5 Correct 4 ms 1112 KB Output is correct
6 Correct 3 ms 1116 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 74 ms 8172 KB Output is correct
9 Correct 96 ms 5036 KB Output is correct
10 Correct 322 ms 13684 KB Output is correct
11 Correct 150 ms 13652 KB Output is correct
12 Correct 154 ms 13648 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 77 ms 8020 KB Output is correct
15 Correct 22 ms 2136 KB Output is correct
16 Correct 376 ms 13656 KB Output is correct
17 Correct 168 ms 13648 KB Output is correct
18 Correct 182 ms 13800 KB Output is correct

Subtask #4
39.0 / 39.0

# 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 480 KB Output is correct
4 Correct 4 ms 1116 KB Output is correct
5 Correct 3 ms 1116 KB Output is correct
6 Correct 3 ms 1116 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 78 ms 8160 KB Output is correct
9 Correct 104 ms 5016 KB Output is correct
10 Correct 357 ms 13648 KB Output is correct
11 Correct 173 ms 13780 KB Output is correct
12 Correct 163 ms 13732 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 88 ms 8260 KB Output is correct
15 Correct 23 ms 2140 KB Output is correct
16 Correct 403 ms 13668 KB Output is correct
17 Correct 197 ms 13652 KB Output is correct
18 Correct 179 ms 13784 KB Output is correct
19 Correct 377 ms 98128 KB Output is correct
20 Correct 353 ms 98128 KB Output is correct
21 Correct 373 ms 98128 KB Output is correct
22 Correct 371 ms 98136 KB Output is correct
23 Correct 402 ms 98128 KB Output is correct
24 Correct 375 ms 98128 KB Output is correct
25 Correct 414 ms 98128 KB Output is correct
26 Correct 404 ms 98128 KB Output is correct
27 Correct 395 ms 98128 KB Output is correct
28 Correct 398 ms 98084 KB Output is correct
29 Correct 373 ms 98124 KB Output is correct
30 Correct 370 ms 98128 KB Output is correct