oj.uz

Submission #837191

# Submission time Handle Problem Language Result Execution time Memory
837191 2023-08-25T07:37:00 Z _martynas The Kingdom of JOIOI (JOI17_joioi) C++11
100 / 100
 2399 ms 58772 KB 
#include <bits/stdc++.h>

using namespace std;

#warning change mxn
const int mxn = 2005;
const int inf = 2e9;

int h, w;
int mxa = 0;
int a[mxn][mxn];
bool b[mxn][mxn];

int check() {
    int mnj = w;
    int mn = inf/2, mx = 0;
    for(int i = 0; i < h; i++) {
        for(int j = 0; j < mnj; j++) {
            if(b[i][j]) mnj = j;
        }
        for(int j = mnj; j < w; j++) {
            mn = min(mn, a[i][j]);
            mx = max(mx, a[i][j]);
        }
    }
    return mx-mn;
}

bool solve(int k) {
    for(int i = 0; i < h; i++)
    for(int j = 0; j < w; j++)
        b[i][j] = mxa-a[i][j]>k;
    bool ok = false;
    // check
    ok = ok || (check() <= k);
    // reverse rows
    for(int i = 0; i < h; i++) for(int j = 0; j < w/2; j++) swap(a[i][j], a[i][w-j-1]);
    for(int i = 0; i < h; i++) for(int j = 0; j < w/2; j++) swap(b[i][j], b[i][w-j-1]);
    // check
    ok = ok || (check() <= k);
    // reverse cols
    for(int i = 0; i < h/2; i++) for(int j = 0; j < w; j++) swap(a[i][j], a[h-i-1][j]);
    for(int i = 0; i < h/2; i++) for(int j = 0; j < w; j++) swap(b[i][j], b[h-i-1][j]);
    // check
    ok = ok || (check() <= k);
    // reverse rows
    for(int i = 0; i < h; i++) for(int j = 0; j < w/2; j++) swap(a[i][j], a[i][w-j-1]);
    for(int i = 0; i < h; i++) for(int j = 0; j < w/2; j++) swap(b[i][j], b[i][w-j-1]);
    // check
    ok = ok || (check() <= k);
    // reverse cols
    for(int i = 0; i < h/2; i++) for(int j = 0; j < w; j++) swap(a[i][j], a[h-i-1][j]);
    for(int i = 0; i < h/2; i++) for(int j = 0; j < w; j++) swap(b[i][j], b[h-i-1][j]);
    return ok;
}

int main(int argc, char const *argv[]) {
    cin >> h >> w;
    for(int i = 0; i < h; i++) {
        for(int j = 0; j < w; j++) {
            cin >> a[i][j]; mxa = max(mxa, a[i][j]);
        }
    }
    int lo = 0, hi = inf/2;
    while(lo < hi) {
        int m = (lo+hi)/2;
        if(solve(m)) {
            hi = m;
        }
        else {
            lo = m+1;
        }
    }
    cout << lo << "\n";
    return 0;
}

Compilation message

joioi.cpp:5:2: warning: #warning change mxn [-Wcpp]
    5 | #warning change mxn
      |  ^~~~~~~

Subtask #1
15.0 / 15.0

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

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 380 KB Output is correct
16 Correct 11 ms 1656 KB Output is correct
17 Correct 22 ms 1924 KB Output is correct
18 Correct 18 ms 1832 KB Output is correct
19 Correct 17 ms 1928 KB Output is correct
20 Correct 16 ms 1636 KB Output is correct
21 Correct 22 ms 2036 KB Output is correct
22 Correct 20 ms 2004 KB Output is correct
23 Correct 22 ms 2004 KB Output is correct
24 Correct 19 ms 1748 KB Output is correct
25 Correct 22 ms 2020 KB Output is correct
26 Correct 21 ms 2044 KB Output is correct
27 Correct 21 ms 1972 KB Output is correct
28 Correct 21 ms 1984 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 2 ms 380 KB Output is correct
16 Correct 11 ms 1656 KB Output is correct
17 Correct 22 ms 1924 KB Output is correct
18 Correct 18 ms 1832 KB Output is correct
19 Correct 17 ms 1928 KB Output is correct
20 Correct 16 ms 1636 KB Output is correct
21 Correct 22 ms 2036 KB Output is correct
22 Correct 20 ms 2004 KB Output is correct
23 Correct 22 ms 2004 KB Output is correct
24 Correct 19 ms 1748 KB Output is correct
25 Correct 22 ms 2020 KB Output is correct
26 Correct 21 ms 2044 KB Output is correct
27 Correct 21 ms 1972 KB Output is correct
28 Correct 21 ms 1984 KB Output is correct
29 Correct 1693 ms 41068 KB Output is correct
30 Correct 1541 ms 41436 KB Output is correct
31 Correct 1728 ms 42984 KB Output is correct
32 Correct 1583 ms 42948 KB Output is correct
33 Correct 1425 ms 37544 KB Output is correct
34 Correct 1609 ms 43224 KB Output is correct
35 Correct 2161 ms 58692 KB Output is correct
36 Correct 2399 ms 53556 KB Output is correct
37 Correct 2066 ms 58772 KB Output is correct