oj.uz

Submission #362044

# Submission time Handle Problem Language Result Execution time Memory
362044 2021-02-01T16:05:49 Z Galebickosikasa The Kingdom of JOIOI (JOI17_joioi) C++17
60 / 100
 4000 ms 77036 KB 
// #pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math")
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,sse4.1,sse4.2,popcnt,abm,mmx,avx")
 
#include <iostream>
#include <vector>
#include <cmath>
#include <algorithm>
#include <unordered_map>
#include <set>
#include <map>
#include <queue>
#include <random>
#include <chrono>

#define fi first
#define se second
#define pb push_back
#define ll long long
#define ld long double
#define hm unordered_map 
#define pii pair<int, int>
#define sz(a) (int)a.size()
#define all(a) a.begin(), a.end()
#define cinv(v) for (auto& x: v) cin >> x
#define fr(i, n) for (int i = 0; i < n; ++i)
#define fl(i, l, n) for (int i = l; i < n; ++i)

// #define int ll

template <typename T1, typename T2> inline bool chkmin(T1 &x, const T2 &y) {if (x > y) {x = y; return 1;} return 0;}
template <typename T1, typename T2> inline bool chkmax(T1 &x, const T2 &y) {if (x < y) {x = y; return 1;} return 0;}

using namespace std;

#ifdef LOCAL
	#define dbg(x) cerr << #x << " : " << x << '\n'
#else 
	#define dbg(x)
#endif

//tg: @runningcherry
 
template <typename T1, typename T2> ostream& operator << (ostream& out, const pair<T1, T2>& v) {
	out << v.fi << ", " << v.se;
	return out;
}

template<typename T> ostream& operator << (ostream& out, const vector<T>& v) {
	for (auto& x: v) out << x << " ";
	return out;
}

template <typename T1, typename T2> istream& operator >> (istream& in, pair<T1, T2>& a) {
	in >> a.fi >> a.se;
	return in;
}

const ll inf = (ll) 1e9;
const ld pi = asin (1) * 2;
const ld eps = 1e-8;
const ll mod = (ll)1e9 + 7;
const ll ns = 97;

const int maxn = 2000 + 20;

mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());

int goo[maxn][maxn], n, m, mxp[maxn][maxn], mnp[maxn][maxn], mxs[maxn][maxn], mns[maxn][maxn];
set <int> gay;

inline int check (int x) {
	dbg (x);
	vector<int> kek (n, -1);
	for (auto& mn: gay) {
		int mx = mn + x;
		fr (i, n) {
			while (kek[i] != -1 && mnp[i][kek[i]] < mn) --kek[i];
			while (kek[i] + 1 < m && mnp[i][kek[i] + 1] >= mn && mxp[i][kek[i] + 1] <= mx) ++kek[i];
		}
		dbg (mn);
		dbg (mx);
		dbg (kek);
		int last = kek[0];
		int mx1 = -inf, mn1 = inf;
		fr (i, n) {
			chkmin (last, kek[i]);
			if (last + 1 < m) {
				chkmin (mn1, mns[i][last + 1]);
				chkmax (mx1, mxs[i][last + 1]);
			}
		}
		dbg (mx1);
		dbg (mn1);
		if (mx1 - mn1 <= x) return 1;
		last = kek.back ();
		mx1 = -inf, mn1 = inf;
		for (int i = n - 1; i >= 0; --i) {
			chkmin (last, kek[i]);
			if (last + 1 < m) {
				chkmin (mn1, mns[i][last + 1]);
				chkmax (mx1, mxs[i][last + 1]);
			}
		}
		dbg (mx1);
		dbg (mn1);
		if (mx1 - mn1 <= x) return 1;
	}
	return 0;
}

int bs () {
	int l = -1, r = 1e9;
	while (r - l > 1) {
		int m = (r + l) >> 1;
		if (check (m)) r = m;
		else l = m;
	}
	return r;
}

signed main () {
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
	cout.tie(nullptr);
	cin >> n >> m;
	fr (i, n) fr (j, m) cin >> goo[i][j];
	fr (i, n) {
		mnp[i][0] = mxp[i][0] = goo[i][0];
		fl (j, 1, m) {
			mnp[i][j] = min (mnp[i][j - 1], goo[i][j]);
			mxp[i][j] = max (mxp[i][j - 1], goo[i][j]);
		}
		mns[i][m - 1] = mxs[i][m - 1] = goo[i][m - 1];
		for (int j = m - 2; j >= 0; --j) {
			mns[i][j] = min (mns[i][j + 1], goo[i][j]);
			mxs[i][j] = max (mxs[i][j + 1], goo[i][j]);
		}
	}
	fr (i, n) fr (j, m) if (goo[i][j] <= goo[0][0]) gay.insert (goo[i][j]);
	cout << bs () << '\n';






}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 492 KB Output is correct
2 Correct 1 ms 492 KB Output is correct
3 Correct 1 ms 492 KB Output is correct
4 Correct 1 ms 492 KB Output is correct
5 Correct 1 ms 620 KB Output is correct
6 Correct 1 ms 492 KB Output is correct
7 Correct 1 ms 620 KB Output is correct
8 Correct 1 ms 492 KB Output is correct
9 Correct 1 ms 492 KB Output is correct
10 Correct 1 ms 492 KB Output is correct
11 Correct 1 ms 620 KB Output is correct
12 Correct 1 ms 620 KB Output is correct
13 Correct 1 ms 620 KB Output is correct
14 Correct 1 ms 620 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 492 KB Output is correct
2 Correct 1 ms 492 KB Output is correct
3 Correct 1 ms 492 KB Output is correct
4 Correct 1 ms 492 KB Output is correct
5 Correct 1 ms 620 KB Output is correct
6 Correct 1 ms 492 KB Output is correct
7 Correct 1 ms 620 KB Output is correct
8 Correct 1 ms 492 KB Output is correct
9 Correct 1 ms 492 KB Output is correct
10 Correct 1 ms 492 KB Output is correct
11 Correct 1 ms 620 KB Output is correct
12 Correct 1 ms 620 KB Output is correct
13 Correct 1 ms 620 KB Output is correct
14 Correct 1 ms 620 KB Output is correct
15 Correct 1 ms 620 KB Output is correct
16 Correct 6 ms 5100 KB Output is correct
17 Correct 890 ms 7020 KB Output is correct
18 Correct 111 ms 5228 KB Output is correct
19 Correct 985 ms 6300 KB Output is correct
20 Correct 938 ms 6076 KB Output is correct
21 Correct 1663 ms 6724 KB Output is correct
22 Correct 2164 ms 6636 KB Output is correct
23 Correct 1498 ms 6192 KB Output is correct
24 Correct 485 ms 5356 KB Output is correct
25 Correct 1672 ms 7040 KB Output is correct
26 Correct 565 ms 5856 KB Output is correct
27 Correct 151 ms 5356 KB Output is correct
28 Correct 475 ms 5740 KB Output is correct

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 492 KB Output is correct
2 Correct 1 ms 492 KB Output is correct
3 Correct 1 ms 492 KB Output is correct
4 Correct 1 ms 492 KB Output is correct
5 Correct 1 ms 620 KB Output is correct
6 Correct 1 ms 492 KB Output is correct
7 Correct 1 ms 620 KB Output is correct
8 Correct 1 ms 492 KB Output is correct
9 Correct 1 ms 492 KB Output is correct
10 Correct 1 ms 492 KB Output is correct
11 Correct 1 ms 620 KB Output is correct
12 Correct 1 ms 620 KB Output is correct
13 Correct 1 ms 620 KB Output is correct
14 Correct 1 ms 620 KB Output is correct
15 Correct 1 ms 620 KB Output is correct
16 Correct 6 ms 5100 KB Output is correct
17 Correct 890 ms 7020 KB Output is correct
18 Correct 111 ms 5228 KB Output is correct
19 Correct 985 ms 6300 KB Output is correct
20 Correct 938 ms 6076 KB Output is correct
21 Correct 1663 ms 6724 KB Output is correct
22 Correct 2164 ms 6636 KB Output is correct
23 Correct 1498 ms 6192 KB Output is correct
24 Correct 485 ms 5356 KB Output is correct
25 Correct 1672 ms 7040 KB Output is correct
26 Correct 565 ms 5856 KB Output is correct
27 Correct 151 ms 5356 KB Output is correct
28 Correct 475 ms 5740 KB Output is correct
29 Execution timed out 4066 ms 77036 KB Time limit exceeded
30 Halted 0 ms 0 KB -