oj.uz

답안 #143405

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
143405 2019-08-13T23:56:10 Z osaaateiasavtnl The Kingdom of JOIOI (JOI17_joioi) C++14
100 / 100
 2584 ms 133528 KB 
#include<bits/stdc++.h>
using namespace std;
#define int long long 
#define app push_back
#define all(a) a.begin(), a.end()
#define bp __builtin_popcount
const int N = 2007, INF = 1e9 + 7;
int n, m, mn = INF, a[N][N], r[N];
int suffmn[N][N], suffmx[N][N];
bool check_(int mid) {
    for (int i = 0; i < n; ++i) {
        suffmn[i][m] = INF; for (int j = m - 1; j >= 0; --j) suffmn[i][j] = min(suffmn[i][j + 1], a[i][j]);
        suffmx[i][m] = -INF; for (int j = m - 1; j >= 0; --j) suffmx[i][j] = max(suffmx[i][j + 1], a[i][j]);
    }
    int mx = mn + mid;
    for (int i = 0; i < n; ++i) { r[i] = 0; while (r[i] < m && a[i][r[i]] <= mx) ++r[i]; }   
    int MN, MX, c;
    c = m; MN = INF; MX = -INF;
    for (int i = 0; i < n; ++i) { c = min(c, r[i]); MN = min(MN, suffmn[i][c]); MX = max(MX, suffmx[i][c]); }
    if (MX - MN <= mid) return 1;
    c = m; MN = INF; MX = -INF;
    for (int i = n - 1; i >= 0; --i) { c = min(c, r[i]); MN = min(MN, suffmn[i][c]); MX = max(MX, suffmx[i][c]); }
    if (MX - MN <= mid) return 1;
    return 0;
}
void kek() {
    for (int i = 0; i < n; ++i) for (int j = 0; j < m / 2; ++j) swap(a[i][j], a[i][m - 1 - j]);
}
bool check(int mid) {
    if (check_(mid)) return 1;
    kek(); bool ans = check_(mid); kek();
    return ans;
}
signed main() {
    #ifdef HOME
    freopen("input.txt", "r", stdin);
    #else
    ios_base::sync_with_stdio(0); cin.tie(0);
    #endif
    cin >> n >> m;
    for (int i = 0; i < n; ++i) for (int j = 0; j < m; ++j) { cin >> a[i][j]; mn = min(mn, a[i][j]); }
    int l = -1, r = INF;
    while (l < r - 1) { int mid = (l + r) >> 1; if (check(mid)) r = mid; else l = mid; }
    cout << r << '\n';
}

Subtask #1
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 380 KB Output is correct
3 Correct 2 ms 504 KB Output is correct
4 Correct 2 ms 504 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 2 ms 504 KB Output is correct
8 Correct 2 ms 508 KB Output is correct
9 Correct 2 ms 504 KB Output is correct
10 Correct 2 ms 504 KB Output is correct
11 Correct 2 ms 504 KB Output is correct
12 Correct 2 ms 504 KB Output is correct
13 Correct 2 ms 504 KB Output is correct
14 Correct 3 ms 504 KB Output is correct

Subtask #2
45.0 / 45.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 380 KB Output is correct
3 Correct 2 ms 504 KB Output is correct
4 Correct 2 ms 504 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 2 ms 504 KB Output is correct
8 Correct 2 ms 508 KB Output is correct
9 Correct 2 ms 504 KB Output is correct
10 Correct 2 ms 504 KB Output is correct
11 Correct 2 ms 504 KB Output is correct
12 Correct 2 ms 504 KB Output is correct
13 Correct 2 ms 504 KB Output is correct
14 Correct 3 ms 504 KB Output is correct
15 Correct 3 ms 504 KB Output is correct
16 Correct 15 ms 3704 KB Output is correct
17 Correct 21 ms 3960 KB Output is correct
18 Correct 21 ms 3960 KB Output is correct
19 Correct 24 ms 3960 KB Output is correct
20 Correct 21 ms 3576 KB Output is correct
21 Correct 29 ms 4088 KB Output is correct
22 Correct 27 ms 4088 KB Output is correct
23 Correct 27 ms 4088 KB Output is correct
24 Correct 21 ms 3704 KB Output is correct
25 Correct 28 ms 4088 KB Output is correct
26 Correct 24 ms 4088 KB Output is correct
27 Correct 25 ms 4088 KB Output is correct
28 Correct 25 ms 4088 KB Output is correct

Subtask #3
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 380 KB Output is correct
3 Correct 2 ms 504 KB Output is correct
4 Correct 2 ms 504 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 2 ms 504 KB Output is correct
8 Correct 2 ms 508 KB Output is correct
9 Correct 2 ms 504 KB Output is correct
10 Correct 2 ms 504 KB Output is correct
11 Correct 2 ms 504 KB Output is correct
12 Correct 2 ms 504 KB Output is correct
13 Correct 2 ms 504 KB Output is correct
14 Correct 3 ms 504 KB Output is correct
15 Correct 3 ms 504 KB Output is correct
16 Correct 15 ms 3704 KB Output is correct
17 Correct 21 ms 3960 KB Output is correct
18 Correct 21 ms 3960 KB Output is correct
19 Correct 24 ms 3960 KB Output is correct
20 Correct 21 ms 3576 KB Output is correct
21 Correct 29 ms 4088 KB Output is correct
22 Correct 27 ms 4088 KB Output is correct
23 Correct 27 ms 4088 KB Output is correct
24 Correct 21 ms 3704 KB Output is correct
25 Correct 28 ms 4088 KB Output is correct
26 Correct 24 ms 4088 KB Output is correct
27 Correct 25 ms 4088 KB Output is correct
28 Correct 25 ms 4088 KB Output is correct
29 Correct 1800 ms 112048 KB Output is correct
30 Correct 1904 ms 116276 KB Output is correct
31 Correct 1681 ms 117756 KB Output is correct
32 Correct 2049 ms 117716 KB Output is correct
33 Correct 1571 ms 103224 KB Output is correct
34 Correct 2040 ms 117880 KB Output is correct
35 Correct 2191 ms 133528 KB Output is correct
36 Correct 2304 ms 127732 KB Output is correct
37 Correct 2584 ms 133368 KB Output is correct