oj.uz

Submission #322449

# Submission time Handle Problem Language Result Execution time Memory
322449 2020-11-14T18:03:58 Z Seanliu The Kingdom of JOIOI (JOI17_joioi) C++14
60 / 100
 1920 ms 73012 KB 
#pragma gcc optimize ("Ofast")
#include <iostream>
#include <algorithm>
#include <utility>
#include <vector>
#include <bitset>
#define ericxiao ios_base::sync_with_stdio(0);cin.tie(0);
#define pii pair<int,int>
#define F first
#define S second
#define max(a,b) (a>b?a:b)
#define min(a,b) (a<b?a:b)
using namespace std;

const int maxN = 2e3 + 326, INF = 2e9 + 326;

int N, M, arr[maxN][maxN], sz, ii, jj;
vector<int> lisan, cnt;
vector<vector<int>> pos;
bitset<maxN> vis[maxN];

inline char readchar() {
    static const size_t bufsize = 65536;
    static char buf[bufsize];
    static char *p = buf, *end = buf;
    if (p == end) end = buf + fread_unlocked(buf, 1, bufsize, stdin), p = buf;
    return *p++;
}

inline void const Read(int & p) {
	p = 0;
	int tmp = 0;
	char c = readchar();
	tmp = !(c^'-');
	while (c < '0' || c > '9') {
		c = readchar();
	}
	while (c >= '0' && c <= '9')
		p = (p<<3)+(p<<1)+(c^48), c = readchar();
	p = tmp?-p:p;
}

inline void take(const int y, const int x, int &mx, int &mn, int &d){
	if(d == 0){
		for(ii = y; ii >= 0 && !vis[ii][x]; ii--){
			for(jj= x; jj >= 0 && !vis[ii][jj]; jj--){
				vis[ii][jj] = true;
				cnt[arr[ii][jj]]--;
				mx = max(mx, arr[ii][jj]);
				mn = min(mn, arr[ii][jj]);
			}
		}
	} else if(d == 1){
		for(ii = y; ii < N && !vis[ii][x]; ii++){
			for(jj= x; jj >= 0 && !vis[ii][jj]; jj--){
				vis[ii][jj] = true;
				cnt[arr[ii][jj]]--;
				mx = max(mx, arr[ii][jj]);
				mn = min(mn, arr[ii][jj]);
			}
		}
	} else if(d == 2){
		for(ii = y; ii < N && !vis[ii][x]; ii++){
			for(jj= x; jj < M && !vis[ii][jj]; jj++){
				vis[ii][jj] = true;
				cnt[arr[ii][jj]]--;
				mx = max(mx, arr[ii][jj]);
				mn = min(mn, arr[ii][jj]);
			}
		}
	} else if(d == 3){
		for(ii = y; ii >= 0 && !vis[ii][x]; ii--){
			for(jj= x; jj < M && !vis[ii][jj]; jj++){
				vis[ii][jj] = true;
				cnt[arr[ii][jj]]--;
				mx = max(mx, arr[ii][jj]);
				mn = min(mn, arr[ii][jj]);
			}
		}
	}
}

inline void rot(){
	for(ii = 0; ii < sz; ii++){
		cnt[ii] = 0;
	}
	for(ii = 0; ii < N; ii++) for(jj = 0; jj < M; jj++) {
		vis[ii][jj] = false;
		cnt[arr[ii][jj]]++;
	}
}

int main(){
	Read(N);
	Read(M);
	for(int i = 0; i < N; i++){
		for(int j = 0; j < M; j++){
			Read(arr[i][j]);
			lisan.push_back(arr[i][j]);
		}
	}
	sort(lisan.begin(), lisan.end());
	sz = unique(lisan.begin(), lisan.end()) - lisan.begin();
	if(sz >= 2e6) return 0;
	pos.resize(sz + 5);
	cnt.resize(sz + 5);
	for(int i = 0; i < N; i++) for(int j = 0; j < M; j++){
		arr[i][j] = lower_bound(lisan.begin(), lisan.begin() + sz, arr[i][j]) - lisan.begin();
		cnt[arr[i][j]]++;
		pos[arr[i][j]].emplace_back(i * M + j);
	}
	int ans = lisan[sz - 1] - lisan[0];
	for(int jizz = 0; jizz < 4; jizz++){
		//cout << "in jizz = " << jizz << endl;
		int mx = -INF, mn = INF, f = 0, e = sz - 1;
		for(int i = 0; i < sz; i++){
			//take all of them
			//
			//cout << "i = " << i << ", = " << lisan[i] << endl;
			for(int id : pos[i]){
				take(id / M, id - id / M * M, mx, mn, jizz);
			}
			/*
			for(int y = 0; y < N; y++) for(int x = 0; x < M; x++){
				cout << vis[y][x] << " \n"[x == M - 1];
			}
			*/
			while(f < sz - 1 && !cnt[f]) f++;
			while(e && !cnt[e]) e--;
			if(f == sz || !e) break;
			ans = min(ans, max(lisan[e] - lisan[f], lisan[mx] - lisan[mn]));
			//cout << "ans = " << ans << endl;
		}
		rot();
	}
	cout << ans << '\n';
}

Compilation message

joioi.cpp:1: warning: ignoring #pragma gcc optimize [-Wunknown-pragmas]
    1 | #pragma gcc optimize ("Ofast")
      |

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 512 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 512 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 9 ms 1768 KB Output is correct
17 Correct 23 ms 3816 KB Output is correct
18 Correct 22 ms 3836 KB Output is correct
19 Correct 25 ms 3816 KB Output is correct
20 Correct 17 ms 3432 KB Output is correct
21 Correct 28 ms 3944 KB Output is correct
22 Correct 21 ms 3816 KB Output is correct
23 Correct 22 ms 3944 KB Output is correct
24 Correct 21 ms 3560 KB Output is correct
25 Correct 28 ms 3944 KB Output is correct
26 Correct 28 ms 3944 KB Output is correct
27 Correct 21 ms 3944 KB Output is correct
28 Correct 20 ms 3944 KB Output is correct

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 512 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 9 ms 1768 KB Output is correct
17 Correct 23 ms 3816 KB Output is correct
18 Correct 22 ms 3836 KB Output is correct
19 Correct 25 ms 3816 KB Output is correct
20 Correct 17 ms 3432 KB Output is correct
21 Correct 28 ms 3944 KB Output is correct
22 Correct 21 ms 3816 KB Output is correct
23 Correct 22 ms 3944 KB Output is correct
24 Correct 21 ms 3560 KB Output is correct
25 Correct 28 ms 3944 KB Output is correct
26 Correct 28 ms 3944 KB Output is correct
27 Correct 21 ms 3944 KB Output is correct
28 Correct 20 ms 3944 KB Output is correct
29 Correct 1784 ms 62408 KB Output is correct
30 Correct 1699 ms 60712 KB Output is correct
31 Correct 1739 ms 62004 KB Output is correct
32 Correct 1920 ms 65840 KB Output is correct
33 Correct 1482 ms 56756 KB Output is correct
34 Correct 1819 ms 61808 KB Output is correct
35 Incorrect 539 ms 73012 KB Output isn't correct
36 Halted 0 ms 0 KB -