Submission #735372

#	Time	Username	Problem	Language	Result	Execution time	Memory
735372		That_Salamander	Stove (JOI18_stove)	C++17	50 / 100	187 ms	199176 KiB

stove

#include <bits/stdc++.h>
#define int long long

#define FOR(var,bound) for(int var = 0; var < bound; var++)
#define FORB(var,lb,ub) for (int var = lb; var < ub; var++)
#define FORR(var,bound) for(int var = bound-1; var >= 0; var--)

using namespace std;

typedef long long ll;
typedef vector<int> vi;
typedef vector<vector<int>> vvi;
typedef pair<int, int> pii;

int n, k;
int t[100005];
int ds[100005];
int dp[5005][5005];

int solve(int idx, int kLeft) {
    if (kLeft < 0) return 1000000000;
    if (idx >= n - 1) return 0;
    if (dp[idx][kLeft] != -1) return dp[idx][kLeft];

    return dp[idx][kLeft] = min(ds[idx] + solve(idx + 1, kLeft), solve(idx + 1, kLeft - 1));
}

signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    
    cin >> n >> k;

    FOR (i, n) {
        cin >> t[i];
    }

    FOR (i, n - 1) {
        ds[i] = t[i+1] - t[i] - 1;
    }

    memset(dp, -1, sizeof(dp));

    cout << n + solve(0, k - 1) << endl;
}

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