oj.uz

Submission #206178

# Submission time Handle Problem Language Result Execution time Memory
206178 2020-03-02T15:53:52 Z stefdasca The Kingdom of JOIOI (JOI17_joioi) C++14
100 / 100
 1210 ms 43384 KB 
#include<bits/stdc++.h>
using namespace std;
int n, m, a[2002][2002], mxA[2002], mnA[2002], mxB[2002], mnB[2002], mx, mn;
bool okA[2002][2002], okB[2002][2002];
bool chk(int vdif)
{
    for(int i = 1; i <= m; ++i)
    {
        mnA[i] = mnB[i] = n+1;
        mxA[i] = mxB[i] = 0;
    }
    for(int i = 1; i <= n; ++i)
        for(int j = 1; j <= m; ++j)
        {
            if(a[i][j] - mn <= vdif)
                okA[i][j] = 1;
            else
                okA[i][j] = 0;
            if(mx - a[i][j] <= vdif)
                okB[i][j] = 1;
            else
                okB[i][j] = 0;
            if(!okA[i][j] && !okB[i][j])
                return 0;
            if(okA[i][j] && !okB[i][j])
            {
                mxA[j] = max(mxA[j], i);
                mnA[j] = min(mnA[j], i);
            }
            if(okB[i][j] && !okA[i][j])
            {
                mxB[j] = max(mxB[j], i);
                mnB[j] = min(mnB[j], i);
            }
        }
   // cout << vdif << '\n';
    bool ok = 1;
    bool ok2 = 1;
    int mxxA = 0, mxxB = 0;
    for(int i = 1; i <= m; ++i)
    {
        /*
        cout << mxA[i] << " " << mnA[i] << " " << mxB[i] << " " << mnB[i] << '\n';
        cout << mxxA << " " << mxxB << '\n';
        cout << ok << " " << ok2 << '\n';
        */
        if(mxA[i] > mnB[i])
            ok = 0;
        if(mxB[i] > mnA[i])
            ok2 = 0;
        if(mnB[i] - 1 < mxxA)
            ok = 0;
        if(mnA[i] - 1 < mxxB)
            ok2 = 0;
        mxxA = max(mxxA, mxA[i]);
        mxxB = max(mxxB, mxB[i]);
    }
    if(ok)
        return 1;
    if(ok2)
        return 1;
    ok = 1;
    ok2 = 1;
    mxxA = n+1, mxxB = n+1;
    for(int i = 1; i <= m; ++i)
    {
        /*
        cout << mxA[i] << " " << mnA[i] << " " << mxB[i] << " " << mnB[i] << '\n';
        cout << mxxA << " " << mxxB << '\n';
        cout << ok << " " << ok2 << '\n';
        */
        if(mxA[i] > mnB[i])
            ok = 0;
        if(mxB[i] > mnA[i])
            ok2 = 0;
        if(mxA[i] > mxxA)
            ok = 0;
        if(mxB[i] > mxxB)
            ok2 = 0;
        mxxA = min(mxxA, mnB[i] - 1);
        mxxB = min(mxxB, mnA[i] - 1);
    }
    if(ok)
        return 1;
    if(ok2)
        return 1;
    return 0;
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cin >> n >> m;
    mn = 1000000001;
    for(int i = 1; i <= n; ++i)
        for(int j = 1; j <= m; ++j)
        {
            cin >> a[i][j];
            mx = max(mx, a[i][j]);
            mn = min(mn, a[i][j]);
        }
    int st = 0;
    int dr = mx - mn;
    int ans = dr;
    while(st <= dr)
    {
        int mid = (st + dr) / 2;
        if(chk(mid))
            ans = mid, dr = mid - 1;
        else
            st = mid + 1;
    }
    cout << ans << '\n';
    return 0;
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 5 ms 376 KB Output is correct
3 Correct 5 ms 376 KB Output is correct
4 Correct 5 ms 376 KB Output is correct
5 Correct 5 ms 504 KB Output is correct
6 Correct 5 ms 376 KB Output is correct
7 Correct 5 ms 376 KB Output is correct
8 Correct 5 ms 380 KB Output is correct
9 Correct 5 ms 376 KB Output is correct
10 Correct 5 ms 376 KB Output is correct
11 Correct 5 ms 504 KB Output is correct
12 Correct 5 ms 380 KB Output is correct
13 Correct 5 ms 376 KB Output is correct
14 Correct 5 ms 376 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 5 ms 376 KB Output is correct
3 Correct 5 ms 376 KB Output is correct
4 Correct 5 ms 376 KB Output is correct
5 Correct 5 ms 504 KB Output is correct
6 Correct 5 ms 376 KB Output is correct
7 Correct 5 ms 376 KB Output is correct
8 Correct 5 ms 380 KB Output is correct
9 Correct 5 ms 376 KB Output is correct
10 Correct 5 ms 376 KB Output is correct
11 Correct 5 ms 504 KB Output is correct
12 Correct 5 ms 380 KB Output is correct
13 Correct 5 ms 376 KB Output is correct
14 Correct 5 ms 376 KB Output is correct
15 Correct 5 ms 504 KB Output is correct
16 Correct 9 ms 2172 KB Output is correct
17 Correct 13 ms 2424 KB Output is correct
18 Correct 11 ms 2424 KB Output is correct
19 Correct 14 ms 2424 KB Output is correct
20 Correct 14 ms 2168 KB Output is correct
21 Correct 15 ms 2552 KB Output is correct
22 Correct 16 ms 2424 KB Output is correct
23 Correct 19 ms 2552 KB Output is correct
24 Correct 13 ms 2296 KB Output is correct
25 Correct 19 ms 2552 KB Output is correct
26 Correct 15 ms 2556 KB Output is correct
27 Correct 15 ms 2552 KB Output is correct
28 Correct 15 ms 2552 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 5 ms 376 KB Output is correct
3 Correct 5 ms 376 KB Output is correct
4 Correct 5 ms 376 KB Output is correct
5 Correct 5 ms 504 KB Output is correct
6 Correct 5 ms 376 KB Output is correct
7 Correct 5 ms 376 KB Output is correct
8 Correct 5 ms 380 KB Output is correct
9 Correct 5 ms 376 KB Output is correct
10 Correct 5 ms 376 KB Output is correct
11 Correct 5 ms 504 KB Output is correct
12 Correct 5 ms 380 KB Output is correct
13 Correct 5 ms 376 KB Output is correct
14 Correct 5 ms 376 KB Output is correct
15 Correct 5 ms 504 KB Output is correct
16 Correct 9 ms 2172 KB Output is correct
17 Correct 13 ms 2424 KB Output is correct
18 Correct 11 ms 2424 KB Output is correct
19 Correct 14 ms 2424 KB Output is correct
20 Correct 14 ms 2168 KB Output is correct
21 Correct 15 ms 2552 KB Output is correct
22 Correct 16 ms 2424 KB Output is correct
23 Correct 19 ms 2552 KB Output is correct
24 Correct 13 ms 2296 KB Output is correct
25 Correct 19 ms 2552 KB Output is correct
26 Correct 15 ms 2556 KB Output is correct
27 Correct 15 ms 2552 KB Output is correct
28 Correct 15 ms 2552 KB Output is correct
29 Correct 665 ms 28280 KB Output is correct
30 Correct 730 ms 39308 KB Output is correct
31 Correct 909 ms 29560 KB Output is correct
32 Correct 664 ms 29432 KB Output is correct
33 Correct 470 ms 41208 KB Output is correct
34 Correct 827 ms 29560 KB Output is correct
35 Correct 899 ms 43384 KB Output is correct
36 Correct 694 ms 40488 KB Output is correct
37 Correct 1210 ms 43256 KB Output is correct