oj.uz

Submission #967147

# Submission time Handle Problem Language Result Execution time Memory
967147 2024-04-21T10:40:32 Z Nhoksocqt1 Gap (APIO16_gap) C++17
30 / 100
 37 ms 3228 KB 
#ifndef Nhoksocqt1
    #include "gap.h"
#endif // Nhoksocqt1
#include<bits/stdc++.h>
using namespace std;

#define inf 0x3f3f3f3f
#define sz(x) int((x).size())
#define fi first
#define se second
typedef long long ll;
typedef pair<int, int> ii;

template<class X, class Y>
	inline bool maximize(X &x, const Y &y) {return (x < y ? x = y, 1 : 0);}
template<class X, class Y>
	inline bool minimize(X &x, const Y &y) {return (x > y ? x = y, 1 : 0);}

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int Random(int l, int r) {
    return uniform_int_distribution<int>(l, r)(rng);
}

const int MAXN = 100005;

ll a[MAXN];
int nArr;

#ifdef Nhoksocqt1

ll _A[MAXN], M;

void MinMax(ll s, ll t, ll *a, ll *b) {
    int l(1), r(nArr), optL(nArr + 1), optR(-1);
    while(l <= r) {
        int mid = (l + r) >> 1;
        if(_A[mid] >= s) {
            optL = mid;
            r = mid - 1;
        } else {
            l = mid + 1;
        }
    }

    l = 1, r = nArr;
    while(l <= r) {
        int mid = (l + r) >> 1;
        if(_A[mid] <= t) {
            optR = mid;
            l = mid + 1;
        } else {
            r = mid - 1;
        }
    }

    M += optR - optL + 2;
    if(optL > optR) {
        *a = *b = -1;
    } else {
        *a = _A[optL], *b = _A[optR];
    }
}

#endif // Nhoksocqt1

ll findGap(int T, int N) {
    nArr = N;
    MinMax(0, ll(1e18), &a[1], &a[nArr]);

    if(T == 1) {
        for (int i = 2; i <= (nArr + 1) / 2; ++i)
            MinMax(a[i - 1] + 1, a[nArr - i + 2] - 1, &a[i], &a[nArr - i + 1]);

        ll res(0);
        for (int i = 1; i < nArr; ++i)
            res = max(res, a[i + 1] - a[i]);

        return res;
    }

    ll answer = 1, lst = a[1];
    int j(0);
    bool check = 1;
    while(check) {
        check = 0;
        ll pos(lst);
        //cout << pos << ":\n";
        for (; j < 60; ++j) {
            ll s, t;
            MinMax(pos + 1, pos + (1LL << (j + 1)) - 1, &s, &t);
            //cout << s << ' ' << t << '\n';
            if(s != -1) {
                answer = max(answer, s - lst);
                lst = t;
                check = 1;
                break;
            }
        }
    }

    return answer;
}

#ifdef Nhoksocqt1

int main() {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    #define TASK "GAP"
    if(fopen(TASK".inp", "r")) {
        freopen(TASK".inp", "r", stdin);
        freopen(TASK".out", "w", stdout);
    }

    int T, N;
    cin >> T >> N;
    for (int i = 1; i <= N; ++i) {
        cin >> _A[i];
        //_A[i] = _A[i - 1] + Random(1, 1e9); cout << _A[i] << " \n"[i == N];
    }

    M = 0;
    cout << "ANSWER: " << findGap(T, N) << '\n';
    cout << "COST ASK: " << M << '\n';
    return 0;
}

#endif // Nhoksocqt1

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2392 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 1 ms 2392 KB Output is correct
4 Correct 2 ms 2476 KB Output is correct
5 Correct 1 ms 2392 KB Output is correct
6 Correct 1 ms 2392 KB Output is correct
7 Correct 1 ms 2392 KB Output is correct
8 Correct 1 ms 2392 KB Output is correct
9 Correct 1 ms 2392 KB Output is correct
10 Correct 1 ms 2392 KB Output is correct
11 Correct 1 ms 2392 KB Output is correct
12 Correct 1 ms 2392 KB Output is correct
13 Correct 1 ms 2392 KB Output is correct
14 Correct 1 ms 2392 KB Output is correct
15 Correct 1 ms 2392 KB Output is correct
16 Correct 7 ms 2592 KB Output is correct
17 Correct 10 ms 2584 KB Output is correct
18 Correct 7 ms 2592 KB Output is correct
19 Correct 8 ms 2592 KB Output is correct
20 Correct 6 ms 2576 KB Output is correct
21 Correct 27 ms 3128 KB Output is correct
22 Correct 27 ms 2872 KB Output is correct
23 Correct 28 ms 2964 KB Output is correct
24 Correct 31 ms 2996 KB Output is correct
25 Correct 24 ms 2892 KB Output is correct
26 Correct 28 ms 3228 KB Output is correct
27 Correct 28 ms 3056 KB Output is correct
28 Correct 27 ms 2888 KB Output is correct
29 Correct 27 ms 2880 KB Output is correct
30 Correct 23 ms 2864 KB Output is correct
31 Correct 1 ms 2392 KB Output is correct
32 Correct 1 ms 2392 KB Output is correct

Subtask #2
0 / 70.0

# Verdict Execution time Memory Grader output
1 Partially correct 1 ms 2392 KB Partially correct
2 Partially correct 0 ms 2392 KB Partially correct
3 Partially correct 1 ms 2392 KB Partially correct
4 Partially correct 1 ms 2392 KB Partially correct
5 Partially correct 1 ms 2392 KB Partially correct
6 Correct 1 ms 2392 KB Output is correct
7 Incorrect 1 ms 2392 KB Output isn't correct
8 Correct 1 ms 2392 KB Output is correct
9 Correct 0 ms 2392 KB Output is correct
10 Correct 1 ms 2392 KB Output is correct
11 Correct 1 ms 2392 KB Output is correct
12 Correct 1 ms 2392 KB Output is correct
13 Correct 1 ms 2392 KB Output is correct
14 Incorrect 1 ms 2392 KB Output isn't correct
15 Partially correct 1 ms 2392 KB Partially correct
16 Incorrect 4 ms 2592 KB Output isn't correct
17 Correct 5 ms 2596 KB Output is correct
18 Correct 4 ms 2592 KB Output is correct
19 Correct 4 ms 2752 KB Output is correct
20 Correct 5 ms 2832 KB Output is correct
21 Correct 16 ms 2768 KB Output is correct
22 Correct 16 ms 2892 KB Output is correct
23 Correct 18 ms 2876 KB Output is correct
24 Correct 15 ms 2872 KB Output is correct
25 Partially correct 37 ms 2872 KB Partially correct
26 Correct 15 ms 2876 KB Output is correct
27 Correct 20 ms 2884 KB Output is correct
28 Correct 16 ms 2888 KB Output is correct
29 Correct 16 ms 2880 KB Output is correct
30 Correct 16 ms 2860 KB Output is correct
31 Partially correct 1 ms 2636 KB Partially correct
32 Correct 1 ms 2392 KB Output is correct