oj.uz

답안 #140530

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
140530 2019-08-03T11:36:10 Z meatrow The Kingdom of JOIOI (JOI17_joioi) C++17
100 / 100
 1183 ms 54924 KB 
//#pragma GCC optimize("O3")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,tune=native")
//#pragma GCC optimize ("unroll-loops")
#include <bits/stdc++.h>

using namespace std;

using ll = long long;
using ld = long double;

const int N = 2000;

int a[N][N];
int bot[N];
int b[N];
int mx;

int solve(int h, int w) {
    for (int i = 0; i < h; i++) {
        b[i] = -1;
        for (int j = 0; j < w; j++) {
            if (a[i][j] == mx) {
                b[i] = j;
            }
        }
    }
    int l = -1, r = 1e9;
    while (l + 1 < r) {
        int mid = (l + r) / 2;
        for (int i = 0; i < h; i++) {
            bot[i] = w;
            for (int j = 0; j < w; j++) {
                if (a[i][j] + mid < mx) {
                    bot[i] = j;
                    break;
                }
            }
        }
        //decreasing
        int d = w - 1;
        bool f = true;
        int kek1 = mx;
        int kek2 = 0;
        for (int i = 0; i < h; i++) {
            d = min(d, bot[i] - 1);
            if (d < b[i]) {
                f = false;
                break;
            }
            for (int j = d + 1; j < w; j++) {
                kek1 = min(kek1, a[i][j]);
                kek2 = max(kek2, a[i][j]);
            }
        }
        if (f && kek2 - kek1 <= mid) {
            r = mid;
            continue;
        }
        l = mid;
    }
    return r;
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    int h, w;
    cin >> h >> w;
    for (int i = 0; i < h; i++) {
        for (int j = 0; j < w; j++) {
            cin >> a[i][j];
            mx = max(mx, a[i][j]);
        }
    }
    int ans = solve(h, w);
    for (int i = 0; i < h; i++) {
        for (int j = 0; j < w / 2; j++) {
            swap(a[i][j], a[i][w - j - 1]);
        }
    }
    ans = min(ans, solve(h, w));
    for (int j = 0; j < w; j++) {
        for (int i = 0; i < h / 2; i++) {
            swap(a[i][j], a[h - i - 1][j]);
        }
    }
    ans = min(ans, solve(h, w));
    for (int i = 0; i < h; i++) {
        for (int j = 0; j < w / 2; j++) {
            swap(a[i][j], a[i][w - j - 1]);
        }
    }
    ans = min(ans, solve(h, w));
    cout << ans;
    return 0;
}

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 376 KB Output is correct
3 Correct 2 ms 504 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 380 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 380 KB Output is correct
14 Correct 2 ms 376 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 376 KB Output is correct
3 Correct 2 ms 504 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 380 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 380 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 9 ms 1272 KB Output is correct
17 Correct 13 ms 1272 KB Output is correct
18 Correct 12 ms 1272 KB Output is correct
19 Correct 13 ms 1272 KB Output is correct
20 Correct 11 ms 1400 KB Output is correct
21 Correct 14 ms 1656 KB Output is correct
22 Correct 14 ms 1656 KB Output is correct
23 Correct 14 ms 1656 KB Output is correct
24 Correct 13 ms 1528 KB Output is correct
25 Correct 14 ms 1704 KB Output is correct
26 Correct 15 ms 1652 KB Output is correct
27 Correct 14 ms 1656 KB Output is correct
28 Correct 14 ms 1656 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 376 KB Output is correct
3 Correct 2 ms 504 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 380 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 380 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 9 ms 1272 KB Output is correct
17 Correct 13 ms 1272 KB Output is correct
18 Correct 12 ms 1272 KB Output is correct
19 Correct 13 ms 1272 KB Output is correct
20 Correct 11 ms 1400 KB Output is correct
21 Correct 14 ms 1656 KB Output is correct
22 Correct 14 ms 1656 KB Output is correct
23 Correct 14 ms 1656 KB Output is correct
24 Correct 13 ms 1528 KB Output is correct
25 Correct 14 ms 1704 KB Output is correct
26 Correct 15 ms 1652 KB Output is correct
27 Correct 14 ms 1656 KB Output is correct
28 Correct 14 ms 1656 KB Output is correct
29 Correct 842 ms 37324 KB Output is correct
30 Correct 785 ms 37624 KB Output is correct
31 Correct 846 ms 39160 KB Output is correct
32 Correct 846 ms 39160 KB Output is correct
33 Correct 715 ms 34296 KB Output is correct
34 Correct 858 ms 39292 KB Output is correct
35 Correct 1119 ms 54912 KB Output is correct
36 Correct 1000 ms 49680 KB Output is correct
37 Correct 1183 ms 54924 KB Output is correct