oj.uz

Submission #191339

# Submission time Handle Problem Language Result Execution time Memory
191339 2020-01-14T17:37:37 Z Akashi The Kingdom of JOIOI (JOI17_joioi) C++14
60 / 100
 4000 ms 54988 KB 
#include <bits/stdc++.h>
using namespace std;

int n, m;
int Min, Max;
int a[2005][2005];

inline bool check(int dif, bool dir1, bool dir2){
    int i, j = 1;

    int adc = 1, adl = 1, Last = n;
    if(dir1 == 1) adc = -1, j = m;
    if(dir2 == 1) adl = -1, Last = 1;

    int mx = 0, mn = 1e9;
    while(j <= m && j >= 1){
        i = 1;
        if(dir2) i = n;

        while(Min + dif >= a[i][j] && (Last - i) * adl >= 0) i += adl;

        Last = i - adl;
        while(i <= n && i >= 1){
            mx = max(mx, a[i][j]);
            mn = min(mn, a[i][j]);
            i += adl;
        }

        j += adc;
    }

    if(mx - mn <= dif) return 1;
    return 0;
}

inline int solve(){
    int st = 0, dr = Max - Min;
    while(st <= dr){
        int mij = (st + dr) / 2;

        bool ok = false;
        for(int dir1 = 0; dir1 < 2 ; ++dir1)
            for(int dir2 = 0; dir2 < 2 ; ++dir2)
                ok |= check(mij, dir1, dir2);

        if(ok) dr = mij - 1;
        else st = mij + 1;
    }

    return st;
}

int main()
{
    scanf("%d%d", &n, &m);

    Min = 1e9; Max = 0;
    for(int i = 1; i <= n ; ++i){
        for(int j = 1; j <= m ; ++j){
            scanf("%d", &a[i][j]);
            Min = min(Min, a[i][j]);
            Max = max(Max, a[i][j]);
        }
    }

    int Sol = solve();
    printf("%d", Sol);

    return 0;
}

Compilation message

joioi.cpp: In function 'int main()':
joioi.cpp:55:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &n, &m);
     ~~~~~^~~~~~~~~~~~~~~~
joioi.cpp:60:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d", &a[i][j]);
             ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 2 ms 380 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 3 ms 420 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 3 ms 404 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 400 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 3 ms 376 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 2 ms 380 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 3 ms 420 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 3 ms 404 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 400 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 3 ms 376 KB Output is correct
15 Correct 2 ms 504 KB Output is correct
16 Correct 7 ms 1400 KB Output is correct
17 Correct 14 ms 1528 KB Output is correct
18 Correct 15 ms 1528 KB Output is correct
19 Correct 14 ms 1528 KB Output is correct
20 Correct 13 ms 1404 KB Output is correct
21 Correct 18 ms 1656 KB Output is correct
22 Correct 18 ms 1656 KB Output is correct
23 Correct 17 ms 1784 KB Output is correct
24 Correct 14 ms 1528 KB Output is correct
25 Correct 17 ms 1656 KB Output is correct
26 Correct 17 ms 1656 KB Output is correct
27 Correct 17 ms 1656 KB Output is correct
28 Correct 17 ms 1656 KB Output is correct

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 2 ms 380 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 3 ms 420 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 3 ms 404 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 400 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 3 ms 376 KB Output is correct
15 Correct 2 ms 504 KB Output is correct
16 Correct 7 ms 1400 KB Output is correct
17 Correct 14 ms 1528 KB Output is correct
18 Correct 15 ms 1528 KB Output is correct
19 Correct 14 ms 1528 KB Output is correct
20 Correct 13 ms 1404 KB Output is correct
21 Correct 18 ms 1656 KB Output is correct
22 Correct 18 ms 1656 KB Output is correct
23 Correct 17 ms 1784 KB Output is correct
24 Correct 14 ms 1528 KB Output is correct
25 Correct 17 ms 1656 KB Output is correct
26 Correct 17 ms 1656 KB Output is correct
27 Correct 17 ms 1656 KB Output is correct
28 Correct 17 ms 1656 KB Output is correct
29 Correct 2509 ms 37484 KB Output is correct
30 Correct 2349 ms 37696 KB Output is correct
31 Correct 2805 ms 39164 KB Output is correct
32 Correct 2717 ms 39184 KB Output is correct
33 Correct 2403 ms 34228 KB Output is correct
34 Correct 2670 ms 39244 KB Output is correct
35 Execution timed out 4021 ms 54988 KB Time limit exceeded
36 Halted 0 ms 0 KB -