Submission #1208170

#	Time	Username	Problem	Language	Result	Execution time	Memory
1208170		lmtonay	Stove (JOI18_stove)	C++17	0 / 100	1 ms	320 KiB

stove

#include <bits/stdc++.h>
using namespace std;

#define fast_io                \
  ios::sync_with_stdio(false); \
  cin.tie(NULL);
typedef long long ll;

const ll INF = 1e18;
const ll MOD = 1e9 + 7;
const double PI = 3.141592653589793;

#define pb push_back
#define ff first
#define ss second
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define endl '\n'

#ifndef ONLINE_JUDGE
#define debug(x)       \
  cerr << #x << " = "; \
  _print(x);           \
  cerr << endl;
#else
#define debug(x)
#endif

void _print(int x) { cerr << x; }
void _print(long x) { cerr << x; }
void _print(ll x) { cerr << x; }
void _print(unsigned x) { cerr << x; }
void _print(unsigned long x) { cerr << x; }
void _print(unsigned long long x) { cerr << x; }
void _print(float x) { cerr << x; }
void _print(double x) { cerr << x; }
void _print(long double x) { cerr << x; }
void _print(char x) { cerr << '\'' << x << '\''; }
void _print(const string &x) { cerr << '"' << x << '"'; }
void _print(bool x) { cerr << (x ? "true" : "false"); }

template <typename T, typename V>
void _print(const pair<T, V> &p)
{
  cerr << '{';
  _print(p.first);
  cerr << ", ";
  _print(p.second);
  cerr << '}';
}
template <typename T>
void _print(const vector<T> &v)
{
  cerr << "[ ";
  for (const auto &i : v)
  {
    _print(i);
    cerr << " ";
  }
  cerr << "]";
}
template <typename T>
void _print(const set<T> &v)
{
  cerr << "{ ";
  for (const auto &i : v)
  {
    _print(i);
    cerr << " ";
  }
  cerr << "}";
}
template <typename T>
void _print(const multiset<T> &v)
{
  cerr << "{ ";
  for (const auto &i : v)
  {
    _print(i);
    cerr << " ";
  }
  cerr << "}";
}
template <typename T>
void _print(const unordered_set<T> &v)
{
  cerr << "{ ";
  for (const auto &i : v)
  {
    _print(i);
    cerr << " ";
  }
  cerr << "}";
}
template <typename T, typename V>
void _print(const map<T, V> &v)
{
  cerr << "{ ";
  for (const auto &i : v)
  {
    _print(i);
    cerr << " ";
  }
  cerr << "}";
}
template <typename T>
void _print(const vector<vector<T>> &v)
{
  cerr << "[\n";
  for (const auto &row : v)
  {
    cerr << "  ";
    _print(row);
    cerr << "\n";
  }
  cerr << "]";
}

int main()
{
  fast_io;

#ifndef ONLINE_JUDGE
  freopen("input.txt", "r", stdin);
  freopen("output.txt", "w", stdout);
#endif

  int n, k;
  cin >> n >> k;

  int nums[n + 1] = {0};

  for (int i = 1; i <= n; i++)
  {
    cin >> nums[i];
  }

  int diff[n] = {0};

  for (int i = 1; i < n; i++)
  {
    diff[i] = nums[i + 1] - nums[i];
  }

  sort(diff, diff + n);

  ll sum = 0;

  for (int i = 0; i < k; i++)
  {
    sum += diff[i] + 1;
  }

  cout << sum << endl;

  return 0;
}

Compilation message (stderr)

stove.cpp: In function 'int main()':
stove.cpp:124:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  124 |   freopen("input.txt", "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
stove.cpp:125:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  125 |   freopen("output.txt", "w", stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 20
• Subtask 2: 0 / 30
• Subtask 3: 0 / 50