Submission #833123

#	Time	Username	Problem	Language	Result	Execution time	Memory
833123		underwaterkillerwhale	K blocks (IZhO14_blocks)	C++14	100 / 100	169 ms	84556 KiB

blocks

#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define rep(i,m,n) for(ll i=m; i<=n; i++)
#define reb(i,m,n) for(ll i=m; i>=n; i--)
#define ii pair<ll,ll>
#define fs first
#define se second
#define pb push_back
#define sz(v) (ll)v.size()
#define ALL(v) v.begin(), v.end()
#define bit(msk, i) ((msk >> i) & 1)
#define file(name) freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout);

using namespace std;

//#ifndef ONLINE_JUDGE
//    #include "debug.h"
//#else
//    #define deb(...) 23
//    #define __
//    #define n____
//#endif

mt19937 rd(chrono :: steady_clock :: now().time_since_epoch().count());
ll Rand (ll l, ll r) {
    return l + rd()%(r - l + 1);
}

const ll N = 1e5 + 7;
const ll Mod = 1e9 + 7;
const ll bse = 137;
const ll INF = 1e18;

ll n, K;
ll a[N];
ll dp[105][N];

void chloe_solution () {
    cin >> n >> K;
    rep (i, 1, n) cin >> a[i];
    memset(dp, 0x3f, sizeof dp);
    dp[0][0] = 0;
    rep (i, 1, K) {
        stack<pair<ll,int>> op;
        rep (j, 1, n) {
            ll mnV = dp[i - 1][j - 1];
            while (!op.empty() && a[op.top().se] <= a[j]) {
                mnV = min(mnV, op.top().fs);
                op.pop();
            }
            dp[i][j] = min(dp[i][(op.empty() == 1) ? 0 : op.top().se], mnV + a[j]);
            op.push({mnV, j});
        }
    }
    cout << dp[K][n] <<"\n";
}

int main() {
    //file("c");
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    ll num_test = 1;
//    cin >> num_test;
    while (num_test--)
        chloe_solution();
}
/*
hbjcyibtycdi!ttcotodf
*/

• Subtask 1: 14 / 14
• Subtask 2: 18 / 18
• Subtask 3: 21 / 21
• Subtask 4: 47 / 47