oj.uz

Submission #415037

# Submission time Handle Problem Language Result Execution time Memory
415037 2021-05-31T13:02:57 Z nvmdava The Kingdom of JOIOI (JOI17_joioi) C++17
100 / 100
 757 ms 54920 KB 
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ff first
#define ss second
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const int N = 100005;
const ll MOD = 1000000007;
const ll INF = 0x3f3f3f3f3f3f3f3f;
const int SQ = 300;

int n, m;
int mn = 1'000'000'000, mx = 0;

int a[2005][2005];

void flipx(){
    for(int i = 1; i <= n; ++i)
        for(int j = 1; j <= m / 2; ++j)
            swap(a[i][j], a[i][m + 1 - j]);
}
void flipy(){
    for(int i = 1; i <= n / 2; ++i)
        for(int j = 1; j <= m; ++j)
            swap(a[i][j], a[n + 1 - i][j]);
}

bool check(int x){
    int lim = m;
    for(int i = 1; i <= n; ++i){
        for(int j = 1; j <= lim; ++j){
            if(a[i][j] < mx - x){
                lim = j - 1;
                break;
            }
        }
        for(int j = lim + 1; j <= m; ++j){
            if(a[i][j] > mn + x)
                return 0;
        }
    }
    return 1;
}

int solve(){
    int l = 0, r = 1'000'000'000;
    while(l != r){
        int m = (l + r) >> 1;
        if(check(m))
            r = m;
        else
            l = m + 1;
    }
    return l;
}

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

    cin>>n>>m;

    for(int i = 1; i <= n; ++i){
        for(int j = 1; j <= m; ++j){
            cin>>a[i][j];
            mn = min(mn, a[i][j]);
            mx = max(mx, a[i][j]);
        }
    }
    int res = 1'000'000'000;
    res = min(res, solve());
    flipx();
    res = min(res, solve());
    flipy();
    res = min(res, solve());
    flipx();
    res = min(res, solve());
    cout<<res;
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 324 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 2 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 2 ms 332 KB Output is correct
11 Correct 1 ms 328 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 2 ms 332 KB Output is correct
14 Correct 1 ms 324 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 324 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 2 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 2 ms 332 KB Output is correct
11 Correct 1 ms 328 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 2 ms 332 KB Output is correct
14 Correct 1 ms 324 KB Output is correct
15 Correct 2 ms 332 KB Output is correct
16 Correct 7 ms 1228 KB Output is correct
17 Correct 9 ms 1484 KB Output is correct
18 Correct 9 ms 1484 KB Output is correct
19 Correct 9 ms 1484 KB Output is correct
20 Correct 7 ms 1356 KB Output is correct
21 Correct 11 ms 1612 KB Output is correct
22 Correct 13 ms 1612 KB Output is correct
23 Correct 9 ms 1668 KB Output is correct
24 Correct 8 ms 1528 KB Output is correct
25 Correct 10 ms 1616 KB Output is correct
26 Correct 9 ms 1612 KB Output is correct
27 Correct 8 ms 1628 KB Output is correct
28 Correct 9 ms 1620 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 324 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 2 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 2 ms 332 KB Output is correct
11 Correct 1 ms 328 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 2 ms 332 KB Output is correct
14 Correct 1 ms 324 KB Output is correct
15 Correct 2 ms 332 KB Output is correct
16 Correct 7 ms 1228 KB Output is correct
17 Correct 9 ms 1484 KB Output is correct
18 Correct 9 ms 1484 KB Output is correct
19 Correct 9 ms 1484 KB Output is correct
20 Correct 7 ms 1356 KB Output is correct
21 Correct 11 ms 1612 KB Output is correct
22 Correct 13 ms 1612 KB Output is correct
23 Correct 9 ms 1668 KB Output is correct
24 Correct 8 ms 1528 KB Output is correct
25 Correct 10 ms 1616 KB Output is correct
26 Correct 9 ms 1612 KB Output is correct
27 Correct 8 ms 1628 KB Output is correct
28 Correct 9 ms 1620 KB Output is correct
29 Correct 611 ms 37192 KB Output is correct
30 Correct 638 ms 37528 KB Output is correct
31 Correct 663 ms 39136 KB Output is correct
32 Correct 657 ms 39132 KB Output is correct
33 Correct 551 ms 34056 KB Output is correct
34 Correct 665 ms 39216 KB Output is correct
35 Correct 757 ms 54768 KB Output is correct
36 Correct 643 ms 49580 KB Output is correct
37 Correct 683 ms 54920 KB Output is correct