Submission #1241915

#	Time	Username	Problem	Language	Result	Execution time	Memory
1241915		hello10	Stove (JOI18_stove)	C++20	100 / 100	12 ms	2244 KiB

stove

#include<bits/stdc++.h>
#define int long long
#define endl "\n"
#define MAXN 1000005
#define inf 1e18
using namespace std;
vector<int> p;
int res=0, n, k;
int a[MAXN];
signed main() {
	if (fopen("temp.inp", "r")){
		freopen("temp.inp", "r", stdin);
		freopen("temp.out", "w", stdout);
	} 
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
	cout.tie(nullptr); 
	cin>>n>>k;
	for (int i=1; i<=n; i++){
		cin>>a[i];
	}
	for (int i=1; i<=n-1; i++){
		p.push_back(a[i+1]-a[i]);
	}
	sort (p.begin(), p.end());
	for (int i=0; i<n-k; i++){
		res+=p[i];
	}
	res+=k;
	cout<<res;
}

Compilation message (stderr)

stove.cpp: In function 'int main()':
stove.cpp:12:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |                 freopen("temp.inp", "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
stove.cpp:13:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |                 freopen("temp.out", "w", stdout);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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