Submission #1068563

#	Time	Username	Problem	Language	Result	Execution time	Memory
1068563		kiethm07	Stove (JOI18_stove)	C++11	100 / 100	22 ms	2404 KiB

stove

#include <bits/stdc++.h>

#define pii pair<int,int>
#define iii pair<int,pii>
#define fi first
#define se second

#define vi vector<int>
#define vii vector<pii>
#define pb(i) push_back(i)
#define all(x) x.begin(),x.end()

#define TEXT "a"

using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;

const int inf = 1e9 + 7;
const ld eps = 1e-8;
const double pi = acos(-1);
const int N = 1e5 + 5;

int a[N];
int n,k;

int main(){
    cin.tie(0) -> sync_with_stdio(0);
    if (fopen(TEXT".inp","r")){
        freopen(TEXT".inp","r",stdin);
        freopen(TEXT".out","w",stdout);
    }
    cin >> n >> k;
    for (int i = 1; i <= n; i++) cin >> a[i];
    int res = k;
    int need = n - k;
    vector<int> v;
    for (int i = 2; i <= n; i++){
        v.push_back(a[i] - a[i - 1]);
    }
    sort(all(v));
    for (int i = 0; i < need; i++) res += v[i];
    cout << res << "\n";
    return 0;
}

Compilation message (stderr)

stove.cpp: In function 'int main()':
stove.cpp:32:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |         freopen(TEXT".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
stove.cpp:33:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |         freopen(TEXT".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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