oj.uz

Submission #322548

# Submission time Handle Problem Language Result Execution time Memory
322548 2020-11-14T19:03:00 Z Seanliu The Kingdom of JOIOI (JOI17_joioi) C++17
15 / 100
 23 ms 3696 KB 
#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
#include <iostream>
#include <algorithm>
#include <utility>
#include <time.h>
#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;
vector<short> 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].reset();
		cnt[arr[ii][jj]]++;
	}
}
 
int main(){
	/*
	Read(N);
	Read(M);
	*/
	ericxiao;
	cin >> N >> M;
	for(int i = 0; i < N; i++){
		for(int j = 0; j < M; j++){
			//Read(arr[i][j]);
			cin >> arr[i][j];
			lisan.push_back(arr[i][j]);
		}
	}
	sort(lisan.begin(), lisan.end());
	sz = unique(lisan.begin(), lisan.end()) - lisan.begin();
	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 < min(sz / 2 + 100, 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);
			}
			if(lisan[mx] - lisan[mn] > ans) break;
			/*
			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]));
			if(lisan[e] - lisan[f] < lisan[mx] - lisan[mn]) break;
			//cout << "ans = " << ans << endl;
		}
		rot();
	}
	cout << ans << '\n';
}

Compilation message

joioi.cpp:2: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
    2 | #pragma GCC optimization ("O3")
      | 
joioi.cpp:3: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
    3 | #pragma GCC optimization ("unroll-loops")
      |

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 1 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 0 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 364 KB Output is correct

Subtask #2
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 1 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 0 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 364 KB Output is correct
15 Correct 1 ms 492 KB Output is correct
16 Correct 11 ms 1648 KB Output is correct
17 Correct 23 ms 3696 KB Output is correct
18 Incorrect 22 ms 3696 KB Output isn't correct
19 Halted 0 ms 0 KB -

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 1 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 0 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 364 KB Output is correct
15 Correct 1 ms 492 KB Output is correct
16 Correct 11 ms 1648 KB Output is correct
17 Correct 23 ms 3696 KB Output is correct
18 Incorrect 22 ms 3696 KB Output isn't correct
19 Halted 0 ms 0 KB -