Submission #918004

#	Time	Username	Problem	Language	Result	Execution time	Memory
918004		vjudge1	Stove (JOI18_stove)	C++17	0 / 100	3 ms	600 KiB

stove

#include <bits/stdc++.h>
// #include <ext/pb_ds/assoc_container.hpp>
// using namespace __gnu_pbds;
using namespace std;
//-----------------------
// #define   ordered_set tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update>
#define            ll long long
#define           ull unsigned long long
#define            pb push_back
#define            pf push_front
#define            mp make_pair
#define      mem(f,x) memset(f, x, sizeof(f))
#define   __lcm(a, b) (1ll * a * b) / __gcd(a, b)
#define  bit(mask, i) ((mask >> i) & 1)
#define           pii pair<int, int>
#define           pll pair<ll, ll>
#define            el '\n'
#define             F first
#define             S second
#define         io(x) freopen(x".inp","r",stdin),freopen(x".out","w",stdout)
//-----------------------
const ll INF = 1e18;
const int MOD = 1e9 + 7;
const int MULTI = 0;
const int dx[4] = {0, 0, 1, -1}; //R L D U
const int dy[4] = {1, -1, 0, 0};
//-----AUTHOR trvhung VNG High School for Gifted Student-----

const int maxn = 1e5 + 5;
int n, k, a[maxn];

void solve() {
	cin >> n >> k;
	for (int i = 1; i <= n; ++i)
		cin >> a[i];

	vector<int> v;
	for (int i = 2; i <= n; ++i)
		v.pb(a[i] - a[i - 1] - 1);
	sort(v.begin(), v.end());

	int ans = a[n] - a[1] + 1;	
	for (int i = v.size() - 1; i >= v.size() - k + 1; --i)
		ans -= v[i];

	cout << ans;
}

signed main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    #ifndef ONLINE_JUDGE
    freopen("input.inp", "r", stdin);
    freopen("output.out", "w", stdout);
    #endif

    if (!MULTI) solve();
    else {
        int test; cin >> test;
        while (test--) solve();
    }
    
    return 0;
}

Compilation message (stderr)

stove.cpp: In function 'void solve()':
stove.cpp:43:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |  for (int i = v.size() - 1; i >= v.size() - k + 1; --i)
      |                             ~~^~~~~~~~~~~~~~~~~~~
stove.cpp: In function 'int main()':
stove.cpp:54:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   54 |     freopen("input.inp", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
stove.cpp:55:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   55 |     freopen("output.out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 20
• Subtask 2: 0 / 30
• Subtask 3: 0 / 50