Submission #168404

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
168404	2019-12-13T03:04:05 Z	abil	Luxury burrow (IZhO13_burrow)	C++14	100 / 100	727 ms	14072 KB

burrow

#include <bits/stdc++.h>

#define fr first
#define sc second
#define pb push_bacak
#define mk make_pair
#define all(s) s.begin(),s.end()
//#define int long long

using namespace std;

const int N = (1e6 + 12);
const int mod = (1e9 + 7);
const int INF = (0x3f3f3f3f);

int a[1012][1012], b[1012], n, m, l[1012], r[1012];

int check(int x){
	for(int i = 1;i <= m; i++){
		b[i] = 0;
	}
	int res = 0;
	stack <int > st;
	for(int i = 1;i <= n; i++){
		for(int j = 1;j <= m; j++){
			if(a[i][j] >= x){
				b[j]++;
			}
			else{
				b[j] = 0;
			}
		}
		for(int j = 1;j <= m; j++){
			while(!st.empty() && b[st.top()] >= b[j]){
				st.pop();
			}
			if(!st.empty()){
				l[j] = st.top() + 1;
			}
			else{
				l[j] = 1;
			}
			st.push(j);
		}
		while(!st.empty()){
			st.pop();
		}
		for(int j = m;j >= 1; j--){
			while(!st.empty() && b[st.top()] >= b[j]){
				st.pop();
			}
			if(!st.empty()){
				r[j] = st.top() - 1;
			}
			else{
				r[j] = m;
			}
			st.push(j);
		}
		while(!st.empty()){
			st.pop();
		}
		for(int j = 1;j <= m; j++){
			res = max(res, (r[j] - l[j] + 1) * b[j]);
		}
	}
	return res;
}

main()
{
	int k;
	scanf("%d%d%d", &n, &m, &k);
	for(int i = 1;i <= n; i++){
		for(int j = 1;j <= m; j++){
			scanf("%d", &a[i][j]);
		}
	}
	//cout << check(2);
	int l = 0, r = INF;
	while(r - l > 1){
		int mid = (r + l) >> 1;
		if(check(mid) >= k){
			l = mid;
		}
		else{
			r = mid;
		}
	}
	if(check(r) >= k){
		l = r;
	}
	
	printf("%d %d", l, check(l));
}

Compilation message

burrow.cpp:70:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main()
      ^
burrow.cpp: In function 'int main()':
burrow.cpp:73:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d", &n, &m, &k);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~
burrow.cpp:76:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d", &a[i][j]);
    ~~~~~^~~~~~~~~~~~~~~~

Subtask #1

100.0 / 100.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	504 KB	Output is correct
2	Correct	2 ms	376 KB	Output is correct
3	Correct	2 ms	376 KB	Output is correct
4	Correct	2 ms	376 KB	Output is correct
5	Correct	3 ms	380 KB	Output is correct
6	Correct	3 ms	504 KB	Output is correct
7	Correct	2 ms	376 KB	Output is correct
8	Correct	8 ms	760 KB	Output is correct
9	Correct	14 ms	1272 KB	Output is correct
10	Correct	33 ms	1400 KB	Output is correct
11	Correct	57 ms	1912 KB	Output is correct
12	Correct	33 ms	2508 KB	Output is correct
13	Correct	43 ms	1244 KB	Output is correct
14	Correct	99 ms	2560 KB	Output is correct
15	Correct	107 ms	2740 KB	Output is correct
16	Correct	111 ms	3060 KB	Output is correct
17	Correct	118 ms	2808 KB	Output is correct
18	Correct	286 ms	5492 KB	Output is correct
19	Correct	324 ms	4984 KB	Output is correct
20	Correct	650 ms	9172 KB	Output is correct
21	Correct	568 ms	10316 KB	Output is correct
22	Correct	706 ms	14072 KB	Output is correct
23	Correct	727 ms	13984 KB	Output is correct
24	Correct	513 ms	7132 KB	Output is correct
25	Correct	520 ms	7252 KB	Output is correct