제출 #500057

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
500057		acm	K개의 묶음 (IZhO14_blocks)	C++14	0 / 100	1 ms	332 KiB

blocks

#ifdef ONLINE_JUDGE
#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math,O3")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#endif
#include <bits/stdc++.h>
#define speed                   \
  ios_base::sync_with_stdio(0); \
  cin.tie(0);                   \
  cout.tie(0);
#define precision     \
  cout.precision(30); \
  cerr.precision(10);
#define ll long long
#define ld long double
#define pb(x) push_back(x)
#define sz(x) (int)x.size()
#define mp(x, y) make_pair(x, y)
#define all(x) x.begin(), x.end()
#define pc(x) __builtin_popcount(x)
#define pcll(x) __builtin_popcountll(x)
#define F first
#define S second
using namespace std;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
void ioi(string name) {
  freopen((name + ".in").c_str(), "r", stdin);
  freopen((name + ".out").c_str(), "w", stdout);
}
ll n, m, a[100005], b[100000], c[100005][18], dp[100005][105];
vector<ll> v;
ll get(ll l, ll r, ll x) {
  ll res = (1LL << 60);
  for (; l <= r; l++) res = min(res, dp[l][x]);
  return res;
}
void kek(ll k) {
  for (int i = k; i <= n; i++) {
    if (b[i] < 2) {
      dp[i][k] = get(k - 1, i - 1, k - 1) + a[i];
    } else {
      dp[i][k] =
          min(get(max(k, b[i]) - 1, i - 1, k - 1) + a[i], dp[i][b[i] + 1]);
    }
  }
}
int main() {
  speed;
  precision;
  // code
  cin >> n >> m;
  for (int i = 0; i <= n + 1; i++) {
    for (int j = 0; j <= m + 1; j++) dp[i][j] = (1LL << 60);
    if (1 <= i && i <= n) {
      cin >> a[i];
      dp[i][1] = max(dp[i - 1][1] * (i > 1), a[i]);
      while (sz(v) && a[v.back()] < a[i]) v.pop_back();
      b[i] = (sz(v) ? v.back() : 0) + 1;
      v.pb(i);
    }
  }
  for (int i = 2; i <= m; i++) kek(i);
  cout << dp[n][m];
  // endl
#ifndef ONLINE_JUDGE
  cerr << "\nTime elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << " s.\n";
#endif
  return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

blocks.cpp: In function 'void ioi(std::string)':
blocks.cpp:26:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   26 |   freopen((name + ".in").c_str(), "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
blocks.cpp:27:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |   freopen((name + ".out").c_str(), "w", stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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