oj.uz

Submission #152643

# Submission time Handle Problem Language Result Execution time Memory
152643 2019-09-08T18:53:50 Z karma The Kingdom of JOIOI (JOI17_joioi) C++14
60 / 100
 4000 ms 16176 KB 
#include<bits/stdc++.h>
#pragma GCC optimize("O3")
#define pb      emplace_back
#define mp      make_pair
#define fi      first
#define se      second
#define ll      long long

using namespace std;

const int N = int(2e3) + 3;
const int inf = int(1e9) + 3;

int n, m, a[N][N], low, mid, high, lim, mn, mx, res, Mx, Mn, h;
bool divided;

bool Check() {
     lim = mn + mid;
     if(a[0][0] > lim && a[0][m - 1] > lim) return 0;
     Mx = 0, Mn = inf, h = n;
     for(int j = 0; j < m; ++j) {
         divided = 0;
         if(a[0][j] > lim) h = 0, divided = 1;
         for(int i = 0; i < n; ++i) {
            if(a[i][j] <= lim && i < h && !divided) continue;
            if(!divided) divided = 1, h = min(h, i);
            Mx = max(Mx, a[i][j]), Mn = min(Mn, a[i][j]);
         }
     }
     if(Mx - Mn <= mid) return 1;
     h = n, Mx = 0, Mn = inf;
     for(int j = m - 1; j >= 0; --j) {
         divided = 0;
         if(a[0][j] > lim) h = 0, divided = 1;
         for(int i = 0; i < n; ++i) {
            if(a[i][j] <= lim && i < h && !divided) continue;
            if(!divided) divided = 1, h = min(h, i);
            Mx = max(Mx, a[i][j]), Mn = min(Mn, a[i][j]);
         }
     }
     return Mx - Mn <= mid;
}

void Solve() {
     mid = res - 1;
     if(!Check()) return;
     low = 0, high = res - 1;
     while(low <= high) {
         mid = (low + high) >> 1;
         if(Check()) high = mid - 1;
         else low = mid + 1;
     }
     res = min(res, low);
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0), cout.tie(0);
    if(fopen("test.inp", "r")) {
        freopen("test.inp", "r", stdin);
        freopen("test.out", "w", stdout);
    }
    cin >> n >> m; mn = inf, mx = 0;
    for(int i = 0; i < n; ++i) {
        for(int j = 0; j < m; ++j) {
           cin >> a[i][j];
           mn = min(mn, a[i][j]);
           mx = max(mx, a[i][j]);
        }
    }
    res = mx - mn;
    Solve();
    for(int j = 0; j < m; ++j) {
        for(int i = 0; n - 1 - i > i; ++i) {
            swap(a[i][j], a[n - 1 - i][j]);
        }
    }
    Solve();
    cout << res;
}

Compilation message

joioi.cpp: In function 'int main()':
joioi.cpp:60:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
         freopen("test.inp", "r", stdin);
         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
joioi.cpp:61:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
         freopen("test.out", "w", stdout);
         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
15.0 / 15.0

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

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 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 380 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 6 ms 1272 KB Output is correct
17 Correct 12 ms 1400 KB Output is correct
18 Correct 11 ms 1272 KB Output is correct
19 Correct 17 ms 1400 KB Output is correct
20 Correct 17 ms 1216 KB Output is correct
21 Correct 14 ms 1272 KB Output is correct
22 Correct 14 ms 1276 KB Output is correct
23 Correct 17 ms 1272 KB Output is correct
24 Correct 11 ms 1144 KB Output is correct
25 Correct 22 ms 1272 KB Output is correct
26 Correct 19 ms 1272 KB Output is correct
27 Correct 14 ms 1272 KB Output is correct
28 Correct 20 ms 1272 KB Output is correct

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 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 380 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 6 ms 1272 KB Output is correct
17 Correct 12 ms 1400 KB Output is correct
18 Correct 11 ms 1272 KB Output is correct
19 Correct 17 ms 1400 KB Output is correct
20 Correct 17 ms 1216 KB Output is correct
21 Correct 14 ms 1272 KB Output is correct
22 Correct 14 ms 1276 KB Output is correct
23 Correct 17 ms 1272 KB Output is correct
24 Correct 11 ms 1144 KB Output is correct
25 Correct 22 ms 1272 KB Output is correct
26 Correct 19 ms 1272 KB Output is correct
27 Correct 14 ms 1272 KB Output is correct
28 Correct 20 ms 1272 KB Output is correct
29 Correct 1547 ms 15400 KB Output is correct
30 Correct 1631 ms 16100 KB Output is correct
31 Correct 1613 ms 16176 KB Output is correct
32 Correct 1674 ms 16160 KB Output is correct
33 Correct 1244 ms 14204 KB Output is correct
34 Correct 1860 ms 16120 KB Output is correct
35 Execution timed out 4019 ms 16112 KB Time limit exceeded
36 Halted 0 ms 0 KB -