Submission #268180

#	Time	Username	Problem	Language	Result	Execution time	Memory
268180		leductoan	Stove (JOI18_stove)	C++14	0 / 100	0 ms	384 KiB

stove

#include<bits/stdc++.h>
using namespace std;
#define task "stove"
#define lb lower_bound
#define ub upper_bound
#define alll(v) (v).begin(),(v).end()
#define szz(v) (v).size()
#define fi first
#define se second
#define pb push_back
#define FOR(i,a,b) for (int i = (a), _b = (b); i <= _b; ++i)
#define FORD(i,b,a) for (int i = (b), _a = (a); i >= _a; --i)
typedef long double ld;
typedef long long ll;
typedef pair<int,int> pii;

const int MOD=1000000007; /// 998244353
const int base=311; /// for hash actually
const int N=1e5+5;

int n,k,a[N];

void solved()
{
    cin>>n>>k;
    --k;
    FOR(i,1,n) cin>>a[i];
    int ans=a[n];
    vector<int> v;
    FOR(i,2,n) v.pb(a[i]-a[i-1]-1);
    sort(alll(v),greater<int>());
    FOR(i,0,k-1)
    {
        ans-=v[i];
    }
    cout<<ans;
}
int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0);
    if(fopen(task".inp","r"))
    {
        freopen(task".inp","r",stdin);
        freopen(task".out","w",stdout);
    }
    solved();
}

Compilation message (stderr)

stove.cpp: In function 'int main()':
stove.cpp:43:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   43 |         freopen(task".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
stove.cpp:44:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   44 |         freopen(task".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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