Submission #499970

#	Time	Username	Problem	Language	Result	Execution time	Memory
499970		acm	K blocks (IZhO14_blocks)	C++14	53 / 100	1082 ms	8652 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], dp[100005][105];
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((i > 1 ? dp[i - 1][1] : 0), a[i]);
    }
  }
  for (int i = 2; i <= m; i++) {
    for (int j = 0; j <= n; j++) {
      ll kek = 0;
      for (int k = j + 1; k <= n; k++) {
        kek = max(kek, a[k]);
        dp[k][i] = min(dp[k][i], dp[j][i - 1] + kek);
      }
    }
  }
  cout << dp[n][m];
  // endl
#ifndef ONLINE_JUDGE
  cerr << "\nTime elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << " s.\n";
#endif
  return 0;
}

Compilation message (stderr)

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