Submission #1146075

#	Time	Username	Problem	Language	Result	Execution time	Memory
1146075		CrabCNH	Stove (JOI18_stove)	C++20	100 / 100	11 ms	1480 KiB

stove

#include <bits/stdc++.h>

#define task   "BriantheCrab"

#define ll     long long
#define pii    pair <int, int>
#define fi     first
#define se     second
#define szf    sizeof
#define sz(s)  (int)((s).size())

using namespace std;

template <class T> void mini (T &t, T f) {if (t > f) t = f;}
template <class T> void maxi (T &t, T f) {if (t < f) t = f;}

const int maxN = 1e5 + 5;
const int inf = 1e9 + 7;
const int mod = 1e9 + 7;

int n, k;
int a[maxN];

void Solve () {
    cin >> n >> k;
    for (int i = 1; i <= n; i ++) {
        cin >> a[i];
    }
    vector <int> dif;
    for (int i = 2; i <= n; i ++) {
        dif.push_back ({a[i] - a[i - 1]});
    }
    sort (dif.begin (), dif.end ());
    int res = n;
    int cur = n - k;
    for (auto it : dif) {
        if (cur == 0) {
            break;
        }
        res += it - 1;
        //cout << it << '\n';
        cur --;
    }
    cout << res;
    return;
}

signed main () {
    cin.tie (nullptr) -> sync_with_stdio (false);
    if (fopen (task".inp", "r")) {
        freopen (task".inp", "r", stdin);
        freopen (task".out", "w", stdout);
    }
    int t = 1;
    //cin >> t;
    while (t --) {
        Solve ();
    } 
    return 0;
}
// Belligerent :)

Compilation message (stderr)

stove.cpp: In function 'int main()':
stove.cpp:51:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   51 |         freopen (task".inp", "r", stdin);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
stove.cpp:52:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   52 |         freopen (task".out", "w", stdout);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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