Submission #1113783

#	Time	Username	Problem	Language	Result	Execution time	Memory
1113783		ntdaccode	Stove (JOI18_stove)	C++17	100 / 100	16 ms	4828 KiB

stove

#include<bits/stdc++.h>
#define fori(i,a,b) for(int i = a;i <= b; i++)
#define int long long
#define pb push_back

using namespace std;

typedef pair<int,int> ii;
typedef tuple<int,int,int> tp;

const int M = 1e6 + 10;
const int N = 1e3 + 10;
const int mod = 1e9 + 7;

int n,k,t[M];
vector<int> edge;
int32_t main()
{
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  if(fopen("1.inp","r"))
  {
    freopen("1.inp","r",stdin);
    freopen("1.out","w",stdout);
  }
  #define task ""
  if(fopen(task".inp","r"))
  {
    freopen(task".inp","r",stdin);
    freopen(task".out","w",stdout);
  }
  cin >> n >> k;
  for(int i = 1;i <= n; i++) cin >> t[i];
  for(int i = 1;i <= n - 1; i++) {
    edge.pb(t[i + 1] - t[i] - 1);
  }
  sort(edge.begin(),edge.end());

  k = n - k;
  int kq = n;
  for(int i = 0; i <= k - 1; i++) {
      kq += edge[i];
  }
  cout << kq;
}

Compilation message (stderr)

stove.cpp: In function 'int32_t main()':
stove.cpp:24:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |     freopen("1.inp","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~
stove.cpp:25:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   25 |     freopen("1.out","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~
stove.cpp:30:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |     freopen(task".inp","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
stove.cpp:31:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |     freopen(task".out","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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