Submission #1033570

#	Time	Username	Problem	Language	Result	Execution time	Memory
1033570		BuiDucManh123	Stove (JOI18_stove)	C++14	100 / 100	15 ms	2028 KiB

stove

#include <bits/stdc++.h>
#define fi first
#define se second
#define ll long long
#define ull unsigned long long
#define pii pair<int, int>
#define pll pair<ll, ll>
#define pb push_back
#define taskname ""
using namespace std;
ll n,k,i,b[100009],a[100009],ans;
int main() {
	if (fopen(taskname".inp","r")) {
		freopen(taskname".inp","r",stdin);
		freopen(taskname".out","w",stdout);
	}
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
    cin>>n>>k;
    for(i=1;i<=n;i++) cin>>a[i];
    for(i=1;i<n;i++){
        b[i]=a[i+1]-a[i]-1;
    }sort(b+1,b+n,greater<>());
    ans=0;
    for(i=1;i<k;i++)
        ans+=b[i];
    cout<<a[n]-a[1]+1-ans;
	return 0;
}

Compilation message (stderr)

stove.cpp: In function 'int main()':
stove.cpp:14:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |   freopen(taskname".inp","r",stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
stove.cpp:15:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |   freopen(taskname".out","w",stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

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