Submission #1209773

#	Time	Username	Problem	Language	Result	Execution time	Memory
1209773		nvc2k8	Stove (JOI18_stove)	C++20	100 / 100	12 ms	1096 KiB

stove

#include <bits/stdc++.h>
#define TASK "aksdjkasdj"
#define INT_LIM (int) 2147483647
#define LL_LIM (long long) 9223372036854775807
#define endl '\n'
#define mp make_pair
#define pb push_back
#define fi first
#define se second
#define BIT(i,x) (((i)>>(x))&1)
#define FOR(i,a,b) for(int i = (a); i<=(b); i++)
#define FORD(i,a,b) for(int i = (a); i>=(b); i--)
#define ll long long
#define pii pair<int,int>
using namespace std;
///------------------------------------------///
int n,k;
int a[100005];
int ans = 0;
vector<int> f;

void inp()
{
    cin >> n >> k;
    f.reserve(100000);
    FOR(i, 1, n) cin >> a[i];

    ans = a[n]+1-a[1];
    FOR(i, 1, n-1)
    {
        f.pb(a[i+1]-a[i]-1);
    }
}

void solve()
{
    sort(f.begin(), f.end(), greater<int>());
    FOR(i, 1, k-1) ans-=f[i-1];
    cout << ans;
}

signed main()
{
    ///--------------------------///
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    if (fopen(TASK".INP","r")!=NULL)
    {
        freopen(TASK".INP","r",stdin);
        freopen(TASK".OUT","w",stdout);
    }
    ///--------------------------///

    int NTEST = 1;
    //cin >> NTEST;

    while (NTEST--)
    {
        inp();
        solve();
    }

    return 0;
}

///------------------------------------------///

Compilation message (stderr)

stove.cpp: In function 'int main()':
stove.cpp:48:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   48 |         freopen(TASK".INP","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
stove.cpp:49:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   49 |         freopen(TASK".OUT","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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