Submission #341933

#	Time	Username	Problem	Language	Result	Execution time	Memory
341933		DrearyJoke	Stove (JOI18_stove)	C++17	100 / 100	22 ms	2924 KiB

stove

#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
using namespace std;
using namespace __gnu_pbds;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
typedef vector<vector<int>> vvi;
typedef vector<ll> vll;
typedef vector<vector<ll>> vvll;
typedef vector<bool> vb;
typedef tree<ll, null_type, less_equal<ll>, rb_tree_tag, tree_order_statistics_node_update> indexed_set;

template <typename T, typename U> std::istream&operator>>(std::istream&i, pair<T,U>&p) {i >> p.x >> p.y; return i;}
template<typename T>std::istream&operator>>(std::istream&i,vector<T>&t) {for(auto&v:t){i>>v;}return i;}
template <typename T, typename U> std::ostream&operator<<(std::ostream&o, const pair<T,U>&p) {o << p.x << ' ' << p.y; return o;}
template<typename T>std::ostream&operator<<(std::ostream&o,const vector<T>&t) {if(t.empty())o<<'\n';for(size_t i=0;i<t.size();++i){o<<t[i]<<" \n"[i == t.size()-1];}return o;}

#define deb(x) cout << '>' << #x << ':' << x << endl;
#define all(v) v.begin(),v.end()
#define rall(v) v.rbegin(),v.rend()
#define END '\n'
#define inf 9e18
#define ff first
#define ss second
#define pb push_back

void solve(){
    ll n, k;
    cin >> n >> k;
    vll A(n);
    cin >> A;
    ll ans = n;
    ll cnt = k - 1;
    vll inval(n - 1);
    for (int i = 1; i < n; ++i) inval[i - 1] = A[i] - A[i - 1] - 1;
    sort(all(inval));
    for (int i = 0; i < n - k; ++i) ans += inval[i];
    cout << ans << END;
}
int main()
{
    ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
    int t = 1;
    // cin >> t;
    while(t--){
        solve();
    }
    return 0;
}

Compilation message (stderr)

stove.cpp: In function 'void solve()':
stove.cpp:36:8: warning: unused variable 'cnt' [-Wunused-variable]
   36 |     ll cnt = k - 1;
      |        ^~~

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