Submission #871022

#	Time	Username	Problem	Language	Result	Execution time	Memory
871022		Trisanu_Das	Giraffes (JOI22_giraffes)	C++17	59 / 100	58 ms	109396 KiB

giraffes

#include<bits/stdc++.h>
using namespace std;
 
int n, a[400];
int dp[400][400][400];
 
int main(){
	cin >> n;
	for (int i = 1; i <= n; i++) cin >> a[i];
	for (int i = n; i; i--){
		for (int j = 1; j <= n; j++) dp[i][i][j] = (a[j] != i);
		for (int j = i+1; j <= n; j++) for (int k = 1; k+j-i <= n; k++) dp[i][j][k] = min({dp[i+1][j][k] + (a[k+j-i] != i), dp[i+1][j][k+1] + (a[k] != i)
						, dp[i][j-1][k] + (a[k+j-i] != j), dp[i][j-1][k+1] + (a[k] != j)});
	}
	cout << dp[1][n][1] << '\n';
}

• Subtask 1: 10 / 10
• Subtask 2: 22 / 22
• Subtask 3: 27 / 27
• Subtask 4: 0 / 41