oj.uz

Submission #741521

# Submission time Handle Problem Language Result Execution time Memory
741521 2023-05-14T09:44:24 Z stevancv Bitaro's travel (JOI23_travel) C++14
5 / 100
 156 ms 34636 KB 
#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define sp ' '
#define en '\n'
#define smin(a, b) a = min(a, b)
#define smax(a, b) a = max(a, b)
using namespace std;
const int N = 2e5 + 2;
const ll linf = 1e18;
int l[N][18], r[N][18], logs[N];
int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int n; cin >> n;
    vector<int> a(n);
    for (int i = 0; i < n; i++) cin >> a[i];
    for (int i = 1; i < n; i++) l[i][0] = 2 * a[i] - a[i - 1];
    for (int j = 1; j < 18; j++) {
        for (int i = 1; i < n - (1 << j) + 1; i++) {
            l[i][j] = max(l[i][j - 1], l[i + (1 << (j - 1))][j - 1]);
        }
    }
    for (int i = 0; i < n - 1; i++) r[i][0] = 2 * a[i] - a[i + 1];
    for (int j = 1; j < 18; j++) {
        for (int i = 0; i < n - (1 << j); i++) {
            r[i][j] = min(r[i][j - 1], r[i + (1 << (j - 1))][j - 1]);
        }
    }
    int zz = 0;
    for (int i = 1; i <= n; i++) {
        if ((1 << (zz + 1)) == i) zz += 1;
        logs[i] = zz;
    }
    auto GetLeft = [&] (int p, int q) {
        int o = logs[q - p + 1];
        return max(l[p][o], l[q - (1 << o) + 1][o]);
    };
    auto GetRight = [&] (int p, int q) {
        int o = logs[q - p + 1];
        return min(r[p][o], r[q - (1 << o) + 1][o]);
    };
    int q; cin >> q;
    while (q--) {
        int s; cin >> s;
        if (s >= a[n - 1]) {
            cout << s - a[0] << en;
            continue;
        }
        if (s <= a[0]) {
            cout << a[n - 1] - s << en;
            continue;
        }
        int up = (int)(upper_bound(a.begin(), a.end(), s) - a.begin());
        int lo = up - 1;
        if (a[lo] == s) lo -= 1;
        int uu = 0;
        ll ans = s;
        if (s - a[lo] > a[up] - s) {
            uu = 1;
            ans = -s;
        }
        while (1) {
            if (uu == 0) {
                if (GetLeft(1, lo) <= a[up] || lo <= 0) {
                    ans += a[n - 1] - 2 * a[0];
                    cout << ans << en;
                    break;
                }
                int lef = 1, rig = lo, gde = -1;
                while (lef <= rig) {
                    int mid = lef + rig >> 1;
                    if (GetLeft(mid, lo) > a[up]) {
                        lef = mid + 1;
                        gde = mid;
                    }
                    else rig = mid - 1;
                }
                ans -= 2 * a[gde];
                uu ^= 1;
                lo = gde - 1;
                up += 1;
                continue;
            }
            if (GetRight(up, n - 2) > a[lo] || up >= n - 1) {
                ans += 2 * a[n - 1] - a[0];
                cout << ans << en;
                break;
            }
            int lef = up, rig = n - 2, gde = -1;
            while (lef <= rig) {
                int mid = lef + rig >> 1;
                if (GetRight(up, mid) <= a[lo]) {
                    rig = mid - 1;
                    gde = mid;
                }
                else lef = mid + 1;
            }
            ans += 2 * a[gde];
            uu ^= 1;
            up = gde + 1;
            lo -= 1;
        }
    }
    return 0;
}

Compilation message

travel.cpp: In function 'int main()':
travel.cpp:73:35: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   73 |                     int mid = lef + rig >> 1;
      |                               ~~~~^~~~~
travel.cpp:93:31: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   93 |                 int mid = lef + rig >> 1;
      |                           ~~~~^~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 592 KB Output is correct
3 Correct 1 ms 596 KB Output is correct
4 Correct 1 ms 596 KB Output is correct
5 Correct 1 ms 596 KB Output is correct
6 Correct 1 ms 596 KB Output is correct
7 Correct 1 ms 596 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 596 KB Output is correct
15 Correct 1 ms 596 KB Output is correct
16 Correct 1 ms 596 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 592 KB Output is correct
3 Correct 1 ms 596 KB Output is correct
4 Correct 1 ms 596 KB Output is correct
5 Correct 1 ms 596 KB Output is correct
6 Correct 1 ms 596 KB Output is correct
7 Correct 1 ms 596 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 596 KB Output is correct
15 Correct 1 ms 596 KB Output is correct
16 Correct 1 ms 596 KB Output is correct
17 Correct 70 ms 31260 KB Output is correct
18 Correct 72 ms 31472 KB Output is correct
19 Correct 72 ms 31600 KB Output is correct
20 Correct 73 ms 31536 KB Output is correct
21 Correct 76 ms 31656 KB Output is correct
22 Correct 71 ms 31692 KB Output is correct
23 Correct 70 ms 31268 KB Output is correct
24 Correct 68 ms 31436 KB Output is correct
25 Incorrect 71 ms 31656 KB Output isn't correct
26 Halted 0 ms 0 KB -

Subtask #3
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 135 ms 33804 KB Output is correct
8 Correct 130 ms 33592 KB Output is correct
9 Correct 149 ms 33388 KB Output is correct
10 Correct 138 ms 33712 KB Output is correct
11 Correct 150 ms 33716 KB Output is correct
12 Correct 131 ms 33720 KB Output is correct
13 Correct 39 ms 3916 KB Output is correct
14 Correct 33 ms 1452 KB Output is correct
15 Incorrect 156 ms 34636 KB Output isn't correct
16 Halted 0 ms 0 KB -

Subtask #4
0 / 55.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 592 KB Output is correct
3 Correct 1 ms 596 KB Output is correct
4 Correct 1 ms 596 KB Output is correct
5 Correct 1 ms 596 KB Output is correct
6 Correct 1 ms 596 KB Output is correct
7 Correct 1 ms 596 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 596 KB Output is correct
15 Correct 1 ms 596 KB Output is correct
16 Correct 1 ms 596 KB Output is correct
17 Correct 70 ms 31260 KB Output is correct
18 Correct 72 ms 31472 KB Output is correct
19 Correct 72 ms 31600 KB Output is correct
20 Correct 73 ms 31536 KB Output is correct
21 Correct 76 ms 31656 KB Output is correct
22 Correct 71 ms 31692 KB Output is correct
23 Correct 70 ms 31268 KB Output is correct
24 Correct 68 ms 31436 KB Output is correct
25 Incorrect 71 ms 31656 KB Output isn't correct
26 Halted 0 ms 0 KB -