Submission #333808

#	Time	Username	Problem	Language	Result	Execution time	Memory
333808		limabeans	Skyline (IZhO11_skyline)	C++17	100 / 100	358 ms	232684 KiB

skyline

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

template<typename T>
void out(T x) { cout << x << endl; exit(0); }
#define watch(x) cout << (#x) << " is " << (x) << endl





using ll = long long;
const ll inf = 1e18;

const int maxn = 314;



int n;
int a[maxn];
ll dp[maxn][maxn][maxn];


void setmin(ll &x, ll y) {
    x = min(x, y);
}

int main() {
    ios_base::sync_with_stdio(false); cin.tie(0);  cout.tie(0);

    cin>>n;
    for (int i=1; i<=n; i++) {
	cin>>a[i];
    }


    for (int i=0; i<=n; i++) {
	for (int j=0; j<maxn; j++) {
	    for (int k=0; k<maxn; k++) {
		dp[i][j][k] = inf;
	    }
	}
    }


    dp[1][0][a[1]] = 0;

    for (int i=1; i<=n; i++) {
	for (int j=maxn-1; j>=0; j--) {
	    for (int k=maxn-1; k>=0; k--) {
		if (k>0) {
		    setmin(dp[i][j][k-1], dp[i][j][k]+3);
		}
		if (j>0 && k>0) {
		    setmin(dp[i][j-1][k-1], dp[i][j][k]+5);
		}
	    }
	}

	if (i==n) {
	    break;
	}



	// j....k.....a[i+1]
	for (int j=0; j<maxn; j++) {
	    for (int k=0; k<maxn; k++) {
		if (a[i+1] >= j && k >= j) {
		    setmin(dp[i+1][k-j][a[i+1]-j], dp[i][j][k] + 7*j);
		}
	    }
	}
    }

    cout<<dp[n][0][0]<<endl;
    
    
    return 0;
}

• Subtask 1: 100 / 100