Submission #1056745

#	Time	Username	Problem	Language	Result	Execution time	Memory
1056745		n1k	Text editor (CEOI24_editor)	C++17	100 / 100	102 ms	42504 KiB

Main

#include <bits/stdc++.h>

#if defined(LOCAL)
#include "debug.cpp"
#else
#define debug(x...) 0
#endif // LOCAL

using namespace std;

using ll = long long;

#define all(a) (a).begin(), (a).end()

void solve(){
	ll n, sr, sc, er, ec; cin >> n >> sr >> sc >> er >> ec;
	vector<ll> l(n), emin(n), smin(n), t(n);
	for(int i=0; i<n; i++) cin >> l[i];
	sr--, sc--, er--, ec--;

	emin[er]=l[er];
	smin[sr]=l[sr];
	for(int i=er+1; i<n; i++) emin[i]=min(emin[i-1], l[i]);
	for(int i=er-1; i>=0; i--) emin[i]=min(emin[i+1], l[i]);
	for(int i=sr+1; i<n; i++) smin[i]=min(smin[i-1], l[i]);
	for(int i=sr-1; i>=0; i--) smin[i]=min(smin[i+1], l[i]);

	ll ans = abs(er - sr) + abs(min(smin[er], sc) - ec);
	for(int r=0; r<n; r++){
		// mit to go to (r, 0) when not visiting (rr, 0)
		// left
		ll best = abs(r - sr) + min(smin[r], sc);
		// right
		if(r)
			best = min(best, abs((r-1) - sr) + l[r-1] - min(smin[r-1], sc) + 1);
		t[r] = best;

		ans = min(ans, abs(sr - r) + abs(r - er) + abs(ec - min({smin[r], emin[r], sc})));
	}
	for(int r=1; r<n; r++){
		t[r]=min(t[r], t[r-1]+1);
	}
	for(int r=n-2; r>=0; r--){
		t[r]=min(t[r], t[r+1]+1);
	}
	for(int r=0; r<n; r++){
		ll best2 = abs(r - er) + ec;
		if(r)
			best2=min(best2, abs((r-1) - er) + abs(min(emin[r-1], l[r-1]) - ec) + 1);

		ans = min(ans, t[r] + best2);
	}
	cout<<ans<<endl;
}

int main() {
	cin.tie(0)->sync_with_stdio(0);
	int t=1; //cin >> t;
	while(t--) solve();
}

• Subtask 0: 0 / 0
• Subtask 1: 5 / 5
• Subtask 2: 14 / 14
• Subtask 3: 26 / 26
• Subtask 4: 11 / 11
• Subtask 5: 44 / 44