oj.uz

Submission #103789

# Submission time Handle Problem Language Result Execution time Memory
103789 2019-04-02T16:24:04 Z RockyB The Kingdom of JOIOI (JOI17_joioi) C++11
100 / 100
 887 ms 16188 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 2 ms 384 KB Output is correct
7 Correct 2 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 3 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 2 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 2 ms 384 KB Output is correct
7 Correct 2 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 3 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 2 ms 384 KB Output is correct
14 Correct 3 ms 384 KB Output is correct
15 Correct 2 ms 384 KB Output is correct
16 Correct 4 ms 1280 KB Output is correct
17 Correct 7 ms 1280 KB Output is correct
18 Correct 10 ms 1280 KB Output is correct
19 Correct 9 ms 1280 KB Output is correct
20 Correct 9 ms 1152 KB Output is correct
21 Correct 9 ms 1280 KB Output is correct
22 Correct 11 ms 1280 KB Output is correct
23 Correct 12 ms 1280 KB Output is correct
24 Correct 9 ms 1152 KB Output is correct
25 Correct 18 ms 1280 KB Output is correct
26 Correct 11 ms 1280 KB Output is correct
27 Correct 13 ms 1280 KB Output is correct
28 Correct 12 ms 1328 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 2 ms 384 KB Output is correct
7 Correct 2 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 3 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 2 ms 384 KB Output is correct
14 Correct 3 ms 384 KB Output is correct
15 Correct 2 ms 384 KB Output is correct
16 Correct 4 ms 1280 KB Output is correct
17 Correct 7 ms 1280 KB Output is correct
18 Correct 10 ms 1280 KB Output is correct
19 Correct 9 ms 1280 KB Output is correct
20 Correct 9 ms 1152 KB Output is correct
21 Correct 9 ms 1280 KB Output is correct
22 Correct 11 ms 1280 KB Output is correct
23 Correct 12 ms 1280 KB Output is correct
24 Correct 9 ms 1152 KB Output is correct
25 Correct 18 ms 1280 KB Output is correct
26 Correct 11 ms 1280 KB Output is correct
27 Correct 13 ms 1280 KB Output is correct
28 Correct 12 ms 1328 KB Output is correct
29 Correct 413 ms 15408 KB Output is correct
30 Correct 469 ms 16188 KB Output is correct
31 Correct 541 ms 16052 KB Output is correct
32 Correct 365 ms 16132 KB Output is correct
33 Correct 309 ms 14172 KB Output is correct
34 Correct 468 ms 16080 KB Output is correct
35 Correct 659 ms 16120 KB Output is correct
36 Correct 662 ms 15992 KB Output is correct
37 Correct 887 ms 16096 KB Output is correct