제출 #54463

#제출 시각아이디문제언어결과실행 시간메모리
54463MladenPK개의 묶음 (IZhO14_blocks)C++17
0 / 100
583 ms46592 KiB
#include<bits/stdc++.h>
#define STIZE(x) fprintf(stderr, "STIZE%lld\n", x);
#define PRINT(x) fprintf(stderr, "%s = %lld\n", #x, x);
#define NL(x) printf("%c", " \n"[(x)]);
#define lld long long
#define pii pair<int,int>
#define pb push_back
#define fi first
#define se second
#define all(a) begin(a),end(a)
#define sz(a) int((a).size())
#define LINF 1000000000000000LL
#define INF 1000000000
#define EPS 1e-9
using namespace std;
#define MAXN 100010
#define MAXK 110
stack<pii> s;
stack<int> mx;
int dp[MAXN][MAXK];
int a[MAXN];
int main() {
    ios::sync_with_stdio(false); cin.tie(0);
    int N, K; cin >> N >> K;
    for(int i = 1; i <= K; i++) dp[0][i] = INF;
    for(int i = 1; i <= N; i++) cin >> a[i];
    for(int k = 1; k <= K; k++) {
        while(!s.empty()) s.pop();
        while(!mx.empty()) mx.pop();
        for(int n = 1; n <= N; n++) {
            int dpr = INF;
            while(!s.empty() && a[n] >= s.top().fi) {
                dpr = min(dpr, s.top().se);
                s.pop();
                mx.pop();
            }

            s.push({a[n], min(dpr,dp[n-1][k-1])});
            mx.push(min((!mx.empty() ? mx.top():INF), s.top().se+s.top().fi));
            dp[n][k] = mx.top();
            //PRINT(dp[n][k]);
        }
    }
    cout << dp[N][K];
    return 0;
}
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