oj.uz

Submission #560801

# Submission time Handle Problem Language Result Execution time Memory
560801 2022-05-12T02:49:56 Z amunduzbaev Cultivation (JOI17_cultivation) C++17
0 / 100
 2000 ms 212 KB 
#include "bits/stdc++.h"
using namespace std;

#define ar array
 
signed main(){
	ios::sync_with_stdio(0); cin.tie(0);
	
	int R, C; cin>>R>>C;
	int n; cin>>n;
	vector<int> x(n), y(n);
	for(int i=0;i<n;i++){
		cin>>x[i]>>y[i];
	}
	
	int res = R + C;
	auto check = [&](int a, int c){
		vector<ar<int, 2>> s;
		s.push_back({1, 0});
		s.push_back({n + 1, 0});
		for(int i=0;i<n;i++){
			//~ x[i] - a, x[i] + c 
			int l = max(1, x[i] - a), r = min(R, x[i] + c);
			s.push_back({l, y[i]});
			s.push_back({r + 1, -y[i]});
		}
		
		sort(s.begin(), s.end());
		multiset<int> ss, bet;
		int m = s.size();
		int A = 0, B = 0, C = 0;
		for(int i=0;i<m;){
			int j = i;
			while(j<m && s[j][0] == s[i][0]){
				if(s[j][1] > 0){
					auto rx = ss.lower_bound(s[j][1]);
					auto lx = rx;
					if(lx != ss.begin() && rx != ss.end()){
						lx--;
						bet.erase(bet.find(*rx - *lx - 1));
						lx++;
					}
					
					if(rx != ss.end()){
						bet.insert(*rx - s[j][1] - 1);
					} if(lx != ss.begin()){
						lx--;
						bet.insert(s[j][1] - *lx - 1);
						lx++;
					}
					
					ss.insert(s[j][1]);
				} else if(s[j][1] < 0) {
					s[j][1] *= -1;
					ss.erase(ss.find(s[j][1]));
					auto rx = ss.lower_bound(s[j][1]);
					auto lx = rx;
					if(rx != ss.end()){
						bet.erase(bet.find(*rx - s[j][1] - 1));
					} if(lx != ss.begin()){ lx--;
						bet.erase(bet.find(s[j][1] - *lx - 1));
						lx++;
					}
					if(lx != ss.begin() && rx != ss.end()){
						lx--;
						bet.insert(*rx - *lx - 1);
						lx++;
					}
				}
				
				j++;
			}
			
			if(j < m && ss.empty()){
				return;
			}
			int left = 0, right = 0, l_r = 0;
			if(!ss.empty()) left = *ss.begin() - 1;
			if(!ss.empty()) right = C - *--ss.end();
			if(!bet.empty()) l_r = *--bet.end();
			//~ tot.push_back({s[i][0], left, right, l_r}); 
			A = max(A, left);
			B = max(B, right);
			C = max(C, l_r);
			i = j;
		}
		//~ cout<<a<<" "<<c<<" "<<A<<" "<<B<<" "<<C<<endl;
		res = min(res, a + c + max(A + B, C));
	};
	
	for(int a=0;a<R;a++){
		for(int c=0;a+c<R;c++){
			check(a, c);
		}
	}
	
	cout<<res<<"\n";
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Incorrect 1 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Incorrect 1 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Incorrect 1 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 30.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2081 ms 212 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2081 ms 212 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Incorrect 1 ms 212 KB Output isn't correct
3 Halted 0 ms 0 KB -