Submission #505984

#	Time	Username	Problem	Language	Result	Execution time	Memory
505984		cig32	Stove (JOI18_stove)	C++17	100 / 100	24 ms	3152 KiB

stove

#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>
using namespace std;
mt19937_64 rng((int)std::chrono::steady_clock::now().time_since_epoch().count());
const int MAXN = 3e5 + 10;
const int MOD = 1e9 + 7;
#define int long long

int rnd(int x, int y) { // random number generator
  int u= uniform_int_distribution<int>(x, y)(rng); return u;
}

void solve(int tc) {
  int N, K;
  cin >> N >> K;
  if(N == 1) {
    cout << "1\n"; return;
  }
  int t[N];
  for(int i=0; i<N; i++) {
    cin >> t[i];
  }
  priority_queue<int> s;
  for(int i=1; i<N; i++) s.push(t[i]-1 - t[i-1]);
  int ans = t[N-1] + 1 - t[0];
  while(K > 1) {
    K--;
    ans -= s.top();
    s.pop();
  }
  cout << ans << "\n";
}

int32_t main(){
  ios::sync_with_stdio(0); cin.tie(0);
  int t = 1; //cin >> t;
  for(int i=1; i<=t; i++) solve(i);
}

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