Submission #238586

#	Time	Username	Problem	Language	Result	Execution time	Memory
238586		rahul_a_n	Stove (JOI18_stove)	C++14	0 / 100	187 ms	66200 KiB

stove

#include<bits/stdc++.h>
using namespace std;
#define ll long long int
#define pb(x) push_back(x)
#define PI pair<int,int>
#define PL pair<long int,long int>
#define PLL pair<ll,ll>
#define Tcase int t;cin>>t;while(t--)
#define MOD 1000000007
#define all(x) x.begin(),x.end()
#define MAXN 200005
#define F first
#define S second
int main() {

#ifndef ONLINE_JUDGE
	// for getting input from input.txt
	freopen("input.txt", "r", stdin);
	// for writing output to output.txt
	freopen("output.txt", "w", stdout);
#endif
	ll n, k;
	cin >> n >> k;
	long int t[n];
	vector<long int>ans;
	for (int i = 0; i < n; i++)cin >> t[i];
	for (int i = 0; i < n - 1; i++)ans.pb(t[i] - t[i + 1] + 1);
	ll tot = t[n - 1] - t[0] + 1;
	sort(all(ans));
	for (int i = 0; i < k - 1; i++)tot += ans[i];
	cout << tot << "\n";
}

Compilation message (stderr)

stove.cpp: In function 'int main()':
stove.cpp:18:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
  freopen("input.txt", "r", stdin);
  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
stove.cpp:20:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
  freopen("output.txt", "w", stdout);
  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

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