Submission #19392611

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Source Code Expand

//#pragma GCC target("avx2")
//#pragma GCC optimize("O3")
//#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>

#define ll long long
#define ull unsigned long long
#define ld long double

#define rep(i, n) for(int i = 0; i < n; ++i)
#define rep2(i, a, b) for(int i = a; i <= b; ++i)
#define rrep(i, a, b) for(int i = a; i >= b; --i)

#define pii pair<int, int>
#define pll pair<ll, ll>

#define fi first
#define se second

#define pb push_back
#define eb emplace_back

#define vi vector<int>
#define vll vector<ll>
#define vpii vector<pii>
#define vpll vector<pll>
#define vvi(a,b,c,d) vector<vector<int>> a(b,vector<int>(c,d));
#define vvll(a,b,c,d) vector<vector<ll>> a(b,vector<ll>(c,d));

#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()

#define endl '\n'
using namespace std;

template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return true; } return false; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return true; } return false; }

const int MOD = 1000000007;
//const int MOD=998244353;
const ll INF = 1e18+1;
const int inf = 1e9+1;
const double PI = acos(-1);
int dx[8] = {1, 0, -1,  0,  1, 1, -1, -1};
int dy[8] = {0, 1,  0, -1, -1, 1,  1, -1};
bool range(int y, int x, int h, int w){
  if(y < 0 || x < 0 || y >= h || x >= w) return false;
  else return true;
}

const int MAX = 310000;


signed main(){
  cin.tie(0);
  ios::sync_with_stdio(false); 
  cout << fixed << setprecision(10);
  
  int n, k;
  cin >> n >> k;
  vll a(n), b(n);
  rep(i, n) cin >> a[i] >> b[i];
  
  priority_queue<pll, vpll, greater<pll>> use;
  rep(i, n) use.push({a[i], b[i]});//終わる時間，追加時間
  
  int cnt = 0;
  ll cur = 0;
  
  while(cnt < k){
    auto[t, b] = use.top();
    use.pop();
    cur += t;
    cnt++;
    use.push({t+b, b});
  }
  cout << cur << endl;
  
  
  return 0;
}

Submission Info

Judge Result