oj.uz

Submission #392852

# Submission time Handle Problem Language Result Execution time Memory
392852 2021-04-22T00:47:18 Z faresbasbs Ancient Books (IOI17_books) C++14
0 / 100
 1 ms 332 KB 
#include <bits/stdc++.h>
#include "books.h"
using namespace std;
long long n,ans,mini,maxi,num,cyc[1000001],L[1000001],R[1000001];
bool seen[1000001];
vector<int> p;

void dfs(long long curr){
	seen[curr] = 1 , L[num] = min(L[num],curr) , R[num] = max(R[num],curr) , cyc[curr] = num;
	mini = min(mini,curr) , maxi = max(maxi,curr);
	if(!seen[p[curr]]){
		dfs(p[curr]);
	}
}

void extend(long long &l , long long &r){
	long long ll = min({l,L[cyc[l]],L[cyc[r]]}) , rr = max({r,R[cyc[l]],R[cyc[r]]});
	while(ll < l || r < rr){
		if(ll < l){
			l -= 1;
			ll = min(ll,L[cyc[l]]);
			rr = max(rr,R[cyc[l]]);
		}else{
			r += 1;
			ll = min(ll,L[cyc[r]]);
			rr = max(rr,R[cyc[r]]);
		}
	}
}

long long getans(long long l , long long r){
	long long ret = 0;
	while(l > mini || r < maxi){
		bool nxtl = false;
		long long costl = 0 , ll = l ,rl = r;
		while(true){
			if(ll <= mini){
				break;
			}
			ll -= 1;
			costl += 2;
			extend(ll,rl);
			if(rl > r){
				nxtl = true;
				break;
			}
		}
		bool nxtr = false;
		long long costr = 0 , lr = l , rr = r;
		while(true){
			if(rr >= maxi){
				break;
			}
			rr += 1;
			costr += 2;
			extend(lr,rr);
			if(lr < l){
				nxtr = true;
				break;
			}
		}
		if(nxtl && nxtr){
			ret += min(costl,costr);
		}else{
			ret += costl+costr;
		}
		l = min(ll,lr) , r = max(rl,rr);
	}
	return ret;
	return ret;
}

long long minimum_walk(vector<int> P , int s){
	p = P , n = p.size() , mini = maxi = s;
	for(long long i = 0 ; i < n ; i += 1){
		ans += abs(p[i]-i);
		if(seen[i]){
			continue;
		}
		L[num] = R[num] = i , cyc[i] = num;
		if(i != p[i]){
			dfs(i);
		}
		num += 1;
	}
	return ans+getans(s,s);
}

Subtask #1
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Incorrect 1 ms 332 KB 3rd lines differ - on the 1st token, expected: '8', found: '10'
4 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Incorrect 1 ms 332 KB 3rd lines differ - on the 1st token, expected: '8', found: '10'
4 Halted 0 ms 0 KB -

Subtask #3
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Incorrect 1 ms 332 KB 3rd lines differ - on the 1st token, expected: '8', found: '10'
4 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 332 KB 3rd lines differ - on the 1st token, expected: '3304', found: '3306'
2 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Incorrect 1 ms 332 KB 3rd lines differ - on the 1st token, expected: '8', found: '10'
4 Halted 0 ms 0 KB -