Submission #1182457

#	Time	Username	Problem	Language	Result	Execution time	Memory
1182457		jahongir	Stove (JOI18_stove)	C++20	100 / 100	11 ms	584 KiB

stove

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <functional>

using namespace std;
using namespace __gnu_pbds;
typedef long long ll;
// #define int ll
#define f first
#define s second
#define pb push_back
#define eb emplace_back
#define pi pair<int,int>
#define all(a) a.begin(),a.end()
#define rand_seed_set srand(chrono::steady_clock::now().time_since_epoch().count())
#define ordered_set tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update>

void setIO(string name = "") {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    if (name.empty()) {
        freopen("input.txt", "r", stdin);
        freopen("output.txt", "w", stdout);
    } else {
        freopen((name + ".in").c_str(), "r", stdin);
        freopen((name + ".out").c_str(), "w", stdout);
    }
}


void solve(){
    int n,k; cin >> n >> k;
    int sum = n;
    vector<int> a(n);
    for(auto &x : a) cin >> x;
    for(int i = n-1; i; i--)
        a[i] = a[i] - a[i-1];
    sort(a.begin()+1,a.end());
    for(int i = 1; i <= n-k; i++)
     sum += a[i]-1;
    cout << sum;
}


signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int t = 1;
    // cin >> t;
    while (t--) solve();
}

Compilation message (stderr)

stove.cpp: In function 'void setIO(std::string)':
stove.cpp:23:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |         freopen("input.txt", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
stove.cpp:24:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |         freopen("output.txt", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
stove.cpp:26:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   26 |         freopen((name + ".in").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
stove.cpp:27:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |         freopen((name + ".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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