Submission #880185

#	Time	Username	Problem	Language	Result	Execution time	Memory
880185		ReLice	Stove (JOI18_stove)	C++14	100 / 100	18 ms	4624 KiB

stove

#include <bits/stdc++.h>
#define ll long long
#define str string
#define ins insert
#define ld long double
#define pb push_back
#define pf push_front
#define pof pop_front()
#define pob pop_back()
#define lb lower_bound
#define ub upper_bound
#define endl "\n"
#define fr first
#define sc second
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
//#define sz size()
#define bc back()
#define ar array
using namespace std;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
template <class _T>
bool chmin(_T &x, const _T &y){
    bool flag=false;
    if(x>y){
        x=y;flag|=true;
    }
    return flag;
}
template <class _T>
bool chmax(_T &x, const _T &y){
    bool flag=false;
    if (x<y){
        x=y;flag|=true;
    }
    return flag;
}
#define ordered_set tree<ll, null_type,less_equal<ll>, rb_tree_tag,tree_order_statistics_node_update>
void fre(string s){freopen((s+".in").c_str(),"r",stdin);freopen((s+".out").c_str(),"w",stdout);}
void start(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
}
const ll inf=1e18+7;
const ll mod=998244353;
const ll N=2e5+7;
const ld eps=1e-9;

void solve(){
	ll i;
	ll n,m;
	ll a,b;
	cin>>n>>m;
	vector<pair<ll,ll>> v;
	for(i=0;i<n;i++){
		cin>>a;
		v.pb({a,a+1});
	}
	vector<ll> v2;
	sort(all(v));
	for(i=1;i<n;i++){
		v2.pb(v[i].fr-v[i-1].sc);
	}
	sort(all(v2));
	ll sum=n;
	for(i=0;i<n-m;i++)sum+=v2[i];
	cout<<sum<<endl;
}
signed main(){
	start();
    ll t=1;
	//cin>>t;
    while(t--) solve();
    return 0;
}
/*







*/

Compilation message (stderr)

stove.cpp: In function 'void solve()':
stove.cpp:55:7: warning: unused variable 'b' [-Wunused-variable]
   55 |  ll a,b;
      |       ^
stove.cpp: In function 'void fre(std::string)':
stove.cpp:41:27: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 | void fre(string s){freopen((s+".in").c_str(),"r",stdin);freopen((s+".out").c_str(),"w",stdout);}
      |                    ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
stove.cpp:41:64: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 | void fre(string s){freopen((s+".in").c_str(),"r",stdin);freopen((s+".out").c_str(),"w",stdout);}
      |                                                         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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