Submission #206758

#	Time	Username	Problem	Language	Result	Execution time	Memory
206758		dCoding	Stove (JOI18_stove)	C++14	50 / 100	381 ms	262144 KiB

stove

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

const int MAXN = 5e3+5;
int a[MAXN];
int dp[MAXN][MAXN];
int n,k;

int DP(int i,int j) {
    if(dp[i][j] != -1) return dp[i][j];
    if(i == 0 || j == 0) return dp[i][j] = 1e18;
    dp[i][j] = DP(i-1,j)+a[i]-a[i-1];
    if(j >= 1) dp[i][j] = min(dp[i][j],DP(i-1,j-1)+1);
    return dp[i][j];
}

void solve() {
    memset(dp,-1,sizeof(dp));
    dp[0][0] = 0;
    cin >> n >> k;
    for(int i = 1; i <= n; i++) cin >> a[i];
    cout << DP(n,k) << "\n";
}

int32_t main() {
    #ifdef LOCAL
    freopen("inp.txt","r",stdin);
    #endif
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    int t = 1; // cin >> t;
    while(t--) solve();
    return 0;
}

• Subtask 1: 20 / 20
• Subtask 2: 30 / 30
• Subtask 3: 0 / 50