Submission #571230

#	Time	Username	Problem	Language	Result	Execution time	Memory
571230		YouAreMyGalaxy	Stove (JOI18_stove)	C++17	100 / 100	25 ms	2144 KiB

stove

//Make CSP great again
//Vengeance
#include <bits/stdc++.h>
#define TASK "TESTCODE"
#define Log2(x) 31 - __builtin_clz(x)
using namespace std;
const int N = 1e5;
int a[N + 1], b[N + 1], n, k;
int res;
void read()
{
    cin >> n >> k;
    for (int i = 1; i <= n; ++ i)
    {
        cin >> a[i];
    }
}
void solve()
{
    for (int i = 2; i <= n; ++ i)
    {
        b[i] = a[i] - 1 - a[i - 1];
    }
    sort(b + 2, b + n + 1);
    res = a[n] + 1 - a[1];
    for (int i = n; i >= n - k + 2; -- i)
    {
        res -= b[i];
    }
    cout << res;
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    if (fopen(TASK".INP", "r"))
    {
        freopen(TASK".INP", "r", stdin);
        //freopen(TASK".OUT", "w", stdout);
    }
    int t = 1;
    bool typetest = false;
    if (typetest)
    {
        cin >> t;
    }
    for (int __ = 1; __ <= t; ++ __)
    {
        //cout << "Case " << __ << ": ";
        read();
        solve();
    }
}

Compilation message (stderr)

stove.cpp: In function 'int main()':
stove.cpp:38:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |         freopen(TASK".INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

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