Submission #1295079

#	Time	Username	Problem	Language	Result	Execution time	Memory
1295079		dominus_oj	Stove (JOI18_stove)	C++20	100 / 100	14 ms	2432 KiB

stove

#include <bits/stdc++.h>
using namespace std;

#define int long long
#define all(s) s.begin(), s.end()
#define endl '\n'
#define pb(x) push_back(x)
#define f first
#define s second
#define yes "YES"
#define no "NO"
#define sz(x) (int)x.size()
typedef pair<int, int> pii;
typedef vector<int> vi;
const int mod = 1e9 + 7;
const double EPS = 1e-7;

void setIO(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}

void solve() {
    int n, k; cin >> n >> k;
    vi a(n);
    for (int i=0; i<n; i++) cin >> a[i];
    vi b;
    for (int i=0; i<n-1; i++) {
        b.push_back(a[i+1] - a[i]);
    }
    sort(all(b));
    int ans = 0;
    for (int i=0; i<n-k; i++) {
        ans += b[i];
    }
    cout<<ans+k<<endl;
}

signed main() {
    // setIO("");
    // freopen("input.txt", "r", stdin);
    // freopen("output.txt", "w", stdout);
    ios::sync_with_stdio(false);
    cin.tie(0);
    int t=1;
    while (t--) solve();
    return 0;
}

Compilation message (stderr)

stove.cpp: In function 'void setIO(std::string)':
stove.cpp:19:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   19 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
stove.cpp:20:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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