Submission #746763

#	Time	Username	Problem	Language	Result	Execution time	Memory
746763		Abrar_Al_Samit	Skyline (IZhO11_skyline)	C++17	100 / 100	157 ms	56152 KiB

skyline

#include<bits/stdc++.h>
using namespace std;

int dp[305][205][205];
int n;
int a[305];

int op3(int i, int &n1, int &n2) {
	int x = n1, y = n2, z = a[i+2];

	int ret = 0;
	int take = min({x, y, z});
	ret = take * 7;

	x -= take;
	y -= take;
	z -= take;

	if(x) {
		if(y) {
			take = min(x, y);
			ret += take * 5;

			x -= take;
			y -= take;

			if(x) {
				ret += x * 3;
			}
		} else {
			ret += x * 3;
		}
	}
	n1 = y, n2 = z;
	return ret;
}
int solve(int i, int n1, int n2) {
	if(i>n) return 0;

	int &ret = dp[i][n1][n2];
	if(ret!=-1) return ret;

	if(!n1) return ret = solve(i+1, n2, a[i+2]);
	if(n1) ret = solve(i, n1-1, n2) + 3;
	if(n1 && n2) ret = solve(i, n1-1, n2-1) + 5;

	int c = op3(i, n1, n2);
	ret = min(ret, c+solve(i+1, n1, n2));
	return ret;
}
void PlayGround() {
	cin>>n;
	for(int i=1; i<=n; ++i) {
		cin>>a[i];
	}	
	memset(dp, -1, sizeof dp);
	cout<<solve(1, a[1], a[2])<<'\n';

	// cerr << "Time elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << " s.\n";
}
int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	PlayGround();
	return 0;
}

• Subtask 1: 100 / 100