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답안 #524084

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
524084 2022-02-08T15:30:06 Z Monarchuwu The Kingdom of JOIOI (JOI17_joioi) C++17
100 / 100
 470 ms 54888 KB 
// JOI chứa min, IOI chứa max
#include<iostream>
#include<algorithm>
using namespace std;
typedef long long ll;

const int N = 2000 + 3, inf = 1e9 + 7;
int h, w;
int a[N][N], mi = inf, ma;

bool check1(int diff) { // trái trên
    for (int i = 1, p(w); i <= h; ++i) {
        for (int j = p; j; --j)
            if (a[i][j] - mi > diff) p = min(p, j - 1); // [1..p] [p+1..w]
        for (int j = p + 1; j <= w; ++j)
            if (ma - a[i][j] > diff) return false;
    }
    return true;
}

bool check2(int diff) { // trái dưới
    for (int i = h, p(w); i; --i) {
        for (int j = p; j; --j)
            if (a[i][j] - mi > diff) p = min(p, j - 1); // [1..p] [p+1..w]
        for (int j = p + 1; j <= w; ++j)
            if (ma - a[i][j] > diff) return false;
    }
    return true;
}

bool check3(int diff) { // phải trên
    for (int i = 1, p(w); i <= h; ++i) {
        for (int j = p; j; --j)
            if (ma - a[i][j] > diff) p = min(p, j - 1); // [1..p] [p+1..w]
        for (int j = p + 1; j <= w; ++j)
            if (a[i][j] - mi > diff) return false;
    }
    return true;
}

bool check4(int diff) { // phải dưới
    for (int i = h, p(w); i; --i) {
        for (int j = p; j; --j)
            if (ma - a[i][j] > diff) p = min(p, j - 1); // [1..p] [p+1..w]
        for (int j = p + 1; j <= w; ++j)
            if (a[i][j] - mi > diff) return false;
    }
    return true;
}

int main() {
    cin.tie(NULL)->sync_with_stdio(false);
    cin >> h >> w;
    for (int i = 1; i <= h; ++i)
        for (int j = 1; j <= w; ++j) {
            cin >> a[i][j];
            mi = min(mi, a[i][j]);
            ma = max(ma, a[i][j]);
        }

    int lo(0), hi(ma - mi - 1), m;
    while (lo <= hi) {
        m = (lo + hi) >> 1;
        if (check1(m) || check2(m) || check3(m) || check4(m))
            hi = m - 1;
        else lo = m + 1;
    }
    cout << hi + 1 << '\n';
}
/**  /\_/\
 *  (= ._.)
 *  / >0  \>1
**/

Subtask #1
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 320 KB Output is correct
4 Correct 1 ms 316 KB Output is correct
5 Correct 0 ms 320 KB Output is correct
6 Correct 1 ms 320 KB Output is correct
7 Correct 0 ms 332 KB Output is correct
8 Correct 1 ms 320 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 320 KB Output is correct
14 Correct 0 ms 300 KB Output is correct

Subtask #2
45.0 / 45.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 320 KB Output is correct
4 Correct 1 ms 316 KB Output is correct
5 Correct 0 ms 320 KB Output is correct
6 Correct 1 ms 320 KB Output is correct
7 Correct 0 ms 332 KB Output is correct
8 Correct 1 ms 320 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 320 KB Output is correct
14 Correct 0 ms 300 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 3 ms 1228 KB Output is correct
17 Correct 6 ms 1484 KB Output is correct
18 Correct 4 ms 1496 KB Output is correct
19 Correct 4 ms 1484 KB Output is correct
20 Correct 4 ms 1356 KB Output is correct
21 Correct 6 ms 1604 KB Output is correct
22 Correct 5 ms 1604 KB Output is correct
23 Correct 5 ms 1604 KB Output is correct
24 Correct 5 ms 1484 KB Output is correct
25 Correct 6 ms 1652 KB Output is correct
26 Correct 5 ms 1604 KB Output is correct
27 Correct 6 ms 1612 KB Output is correct
28 Correct 6 ms 1536 KB Output is correct

Subtask #3
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 320 KB Output is correct
4 Correct 1 ms 316 KB Output is correct
5 Correct 0 ms 320 KB Output is correct
6 Correct 1 ms 320 KB Output is correct
7 Correct 0 ms 332 KB Output is correct
8 Correct 1 ms 320 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 320 KB Output is correct
14 Correct 0 ms 300 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 3 ms 1228 KB Output is correct
17 Correct 6 ms 1484 KB Output is correct
18 Correct 4 ms 1496 KB Output is correct
19 Correct 4 ms 1484 KB Output is correct
20 Correct 4 ms 1356 KB Output is correct
21 Correct 6 ms 1604 KB Output is correct
22 Correct 5 ms 1604 KB Output is correct
23 Correct 5 ms 1604 KB Output is correct
24 Correct 5 ms 1484 KB Output is correct
25 Correct 6 ms 1652 KB Output is correct
26 Correct 5 ms 1604 KB Output is correct
27 Correct 6 ms 1612 KB Output is correct
28 Correct 6 ms 1536 KB Output is correct
29 Correct 289 ms 37260 KB Output is correct
30 Correct 299 ms 37456 KB Output is correct
31 Correct 306 ms 39104 KB Output is correct
32 Correct 317 ms 39112 KB Output is correct
33 Correct 264 ms 34136 KB Output is correct
34 Correct 315 ms 39192 KB Output is correct
35 Correct 429 ms 54888 KB Output is correct
36 Correct 387 ms 49580 KB Output is correct
37 Correct 470 ms 54808 KB Output is correct