oj.uz

Submission #103788

# Submission time Handle Problem Language Result Execution time Memory
103788 2019-04-02T16:23:22 Z RockyB The Kingdom of JOIOI (JOI17_joioi) C++17
100 / 100
 947 ms 16180 KB 
/// In The Name Of God

#include <bits/stdc++.h>

#define f first
#define s second

#define pb push_back
#define pp pop_back
#define mp make_pair

#define sz(x) (int)x.size()
#define sqr(x) ((x) * 1ll * (x))
#define all(x) x.begin(), x.end()

#define rep(i, l, r) for (int i = (l); i <= (r); i++)
#define per(i, l, r) for (int i = (l); i >= (r); i--)

#define Kazakhstan ios_base :: sync_with_stdio(0), cin.tie(0), cout.tie(0);

#define nl '\n'
#define ioi exit(0);

typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;

const int N = (int)2000 + 7;
const int inf = (int)1e9 + 7;
const int mod = (int)1e9 + 7;
const ll linf = (ll)1e18 + 7;

const int dx[] = {-1, 0, 1, 0, 1, -1, -1, 1};
const int dy[] = {0, 1, 0, -1, 1, -1, 1, -1};

using namespace std;

int n, m;
int a[N][N];

int mn = inf, mx = -inf;
bool check(int k) {
	int r = 0;
	rep(i, 1, n) {
		rep(j, 1, m) {
			if (!(a[i][j] <= mn + k)) r = max(r, j);
		}
		rep(j, 1, m) {
			if (!(a[i][j] >= mx - k)) {
				if (j <= r) return 0;
			}
		}
	}
	return 1;
}
int solve() {
	int l = 0, r = mx - mn, res = r;
	while (l <= r) {
		int mid = l + r >> 1;
		if (check(mid)) res = mid, r = mid - 1;
		else l = mid + 1;
	}
	return res;
}
void rows() {
	rep(i, 1, n / 2) {
		rep(j, 1, m) swap(a[i][j], a[n - i + 1][j]);
	}
}
void cols() {
	rep(i, 1, m / 2) {
		rep(j, 1, n) {
			swap(a[j][i], a[j][m - i + 1]);
		}
	}
}

int get_int() {
	char x = getchar();
	while (!isdigit(x)) x = getchar();
	int res = 0;
	while (isdigit(x)) res = res * 10 + x - '0', x = getchar();
	return res;
}
int main() {
	#ifdef IOI2018
		freopen ("in.txt", "r", stdin);
	#endif
	n = get_int(), m = get_int();
	rep(i, 1, n) rep(j, 1, m) {
		a[i][j] = get_int();
		mn = min(mn, a[i][j]);
		mx = max(mx, a[i][j]);
	}
	int ans = mx - mn;
	ans = min(ans, solve());
	cols();
	ans = min(ans, solve());
	rows();
	ans = min(ans, solve());
	cols();
	ans = min(ans, solve());
	cout << ans;
	ioi
}

Compilation message

joioi.cpp: In function 'int solve()':
joioi.cpp:59:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   int mid = l + r >> 1;
             ~~^~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 3 ms 384 KB Output is correct
6 Correct 3 ms 384 KB Output is correct
7 Correct 3 ms 384 KB Output is correct
8 Correct 2 ms 384 KB Output is correct
9 Correct 2 ms 384 KB Output is correct
10 Correct 2 ms 384 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 2 ms 384 KB Output is correct
13 Correct 3 ms 384 KB Output is correct
14 Correct 3 ms 384 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 3 ms 384 KB Output is correct
6 Correct 3 ms 384 KB Output is correct
7 Correct 3 ms 384 KB Output is correct
8 Correct 2 ms 384 KB Output is correct
9 Correct 2 ms 384 KB Output is correct
10 Correct 2 ms 384 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 2 ms 384 KB Output is correct
13 Correct 3 ms 384 KB Output is correct
14 Correct 3 ms 384 KB Output is correct
15 Correct 3 ms 384 KB Output is correct
16 Correct 5 ms 1408 KB Output is correct
17 Correct 8 ms 1408 KB Output is correct
18 Correct 8 ms 1408 KB Output is correct
19 Correct 11 ms 1408 KB Output is correct
20 Correct 10 ms 1280 KB Output is correct
21 Correct 12 ms 1408 KB Output is correct
22 Correct 10 ms 1408 KB Output is correct
23 Correct 15 ms 1408 KB Output is correct
24 Correct 11 ms 1408 KB Output is correct
25 Correct 15 ms 1408 KB Output is correct
26 Correct 13 ms 1408 KB Output is correct
27 Correct 17 ms 1380 KB Output is correct
28 Correct 13 ms 1408 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 3 ms 384 KB Output is correct
6 Correct 3 ms 384 KB Output is correct
7 Correct 3 ms 384 KB Output is correct
8 Correct 2 ms 384 KB Output is correct
9 Correct 2 ms 384 KB Output is correct
10 Correct 2 ms 384 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 2 ms 384 KB Output is correct
13 Correct 3 ms 384 KB Output is correct
14 Correct 3 ms 384 KB Output is correct
15 Correct 3 ms 384 KB Output is correct
16 Correct 5 ms 1408 KB Output is correct
17 Correct 8 ms 1408 KB Output is correct
18 Correct 8 ms 1408 KB Output is correct
19 Correct 11 ms 1408 KB Output is correct
20 Correct 10 ms 1280 KB Output is correct
21 Correct 12 ms 1408 KB Output is correct
22 Correct 10 ms 1408 KB Output is correct
23 Correct 15 ms 1408 KB Output is correct
24 Correct 11 ms 1408 KB Output is correct
25 Correct 15 ms 1408 KB Output is correct
26 Correct 13 ms 1408 KB Output is correct
27 Correct 17 ms 1380 KB Output is correct
28 Correct 13 ms 1408 KB Output is correct
29 Correct 353 ms 15324 KB Output is correct
30 Correct 433 ms 16112 KB Output is correct
31 Correct 505 ms 16152 KB Output is correct
32 Correct 299 ms 15992 KB Output is correct
33 Correct 272 ms 14100 KB Output is correct
34 Correct 430 ms 16124 KB Output is correct
35 Correct 671 ms 15992 KB Output is correct
36 Correct 612 ms 16052 KB Output is correct
37 Correct 947 ms 16180 KB Output is correct