Submission #501844

#	Time	Username	Problem	Language	Result	Execution time	Memory
501844		reo111	K blocks (IZhO14_blocks)	C++17	53 / 100	1095 ms	844 KiB

blocks

//#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math,O3")
//Ofast, avx, avx2, fma
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")

#pragma GCC optimize("Ofast,unroll-loops,no-stack-protector")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")

#include <bits/stdc++.h>

/*#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;*/

#define F first
#define S second
#define mp make_pair
#define pb push_back

#define sz(a) int(a.size())
#define all(a) a.begin(), a.end()
#define bpc(a) __builtin_popcount(a)
#define bpcll(a) __builtin_popcountll(a)
#define wtc(a) cerr << (#a) << " = " << a << '\n'
#define setprec(a) cout.precision(a)
#define base ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define file(a) freopen(a".in", "r", stdin); freopen(a".out", "w", stdout);

#define GET4_(a, b, c, d, ...) d
#define FOR_(i, a, b) for (int i = a; i < b; ++i)
#define FOR1(a) FOR_(i, 0, a)
#define FOR2(i, a) FOR_(i, 0, a)
#define FOR3(i, a, b) FOR_(i, a, b)
#define FORC_(...) GET4_(__VA_ARGS__, FOR3, FOR2, FOR1)
#define FOR(...) FORC_(__VA_ARGS__)(__VA_ARGS__)
#define TRV(i, a) for(auto &i : a)

using namespace std;

typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<pii> vpi;
typedef vector<pll> vpl;
template <class T> using VC = vector<T>;
template <class T, class V> using PR = pair<T, V>;

//template <class T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
//insert(), find_by_order(), order_of_key(), find(), erase(find())*/

template <class T> bool mns(T &a, T b) {return (a > b ? a = b, 1 : 0);}
template <class T> bool mxs(T &a, T b) {return (a < b ? a = b, 1 : 0);}

pii DR[] = {{-1, 0}, {0, 1}, {1, 0}, {0, -1}, {1, 1}, {1, -1}, {-1, 1}, {-1, -1}};
const int INF = 1e9 + 1e7 + 7;
const int MOD = 1e9 + 7;//998244353;//1e9 + 7;
const ll INFLL = 1e18 + 1e16 + 7ll;
const int N = 1e6 + 5;
const int SS = 5e5 + 5; //rank
const int cs = 850;

void Main();
void precalc();

int main() {
    base//d
    //precalc();
    //setprec(10);
    int T = 1;
    //cin >> T;
    FOR(i, 1, T + 1) {
        //cout << "Case #" << i << ": ";
        Main();
    }
    return 0;
}

int n, k, a[N], lg[N], st[N][11], dp[N], pd[N];

int get(int l, int r) {
    int j = lg[r - l + 1];
    //wtc(j);
    return max(st[l][j], st[r - (1 << j) + 1][j]);
}

void Main() {
    scanf("%d%d", &n, &k);
    FOR(n) {
        int x;
        scanf("%d", &x);
        a[i] = x;
    }
    FOR(n) dp[i] = INF;
    lg[1] = 0;
    FOR(i, 2, n + 1) lg[i] = lg[i / 2] + 1;
    FOR(n) st[i][0] = a[i];
    FOR(j, 1, 11) for (int i = 0; i + (1 << j) <= n; ++i) st[i][j] = max(st[i][j - 1], st[i + (1 << (j - 1))][j - 1]);
    FOR(n) pd[i] = get(0, i);
    FOR(j, 2, k + 1) {
        FOR(i, j - 1, n) {
            FOR(l, max(0, j - 2), i) {
                mns(dp[i], pd[l] + get(l + 1, i));
            }
        }
        FOR(i, j - 1, n) pd[i] = dp[i], dp[i] = INF;
    }
    /*FOR(n) {
        FOR(j, k + 1) {
            cout << dp[i][j] << ' ';
        }
        cout << endl;
    }*/
    printf("%d", pd[n - 1]);
}

Compilation message (stderr)

blocks.cpp: In function 'void Main()':
blocks.cpp:89:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   89 |     scanf("%d%d", &n, &k);
      |     ~~~~~^~~~~~~~~~~~~~~~
blocks.cpp:92:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   92 |         scanf("%d", &x);
      |         ~~~~~^~~~~~~~~~

• Subtask 1: 14 / 14
• Subtask 2: 18 / 18
• Subtask 3: 21 / 21
• Subtask 4: 0 / 47