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Submission #642222

# Submission time Handle Problem Language Result Execution time Memory
642222 2022-09-19T00:41:55 Z christinelynn Palembang Bridges (APIO15_bridge) C++17
100 / 100
 77 ms 5304 KB 
#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define db double
#define pairll pair<ll,ll>
#define lpairll pair<ll,pairll>

#define repp(i,a,b) for (ll i = a; i <= b; i++)
#define repz(i,a,b) for (ll i = a; i < b; i++)
#define repm(i,a,b) for (ll i = a; i >= b; i--)
#define fr first
#define sc second
#define mp make_pair
#define pb push_back

const ll N = 2e5+5, MOD = 1e9+7, M = 1e5+5;
ll tc = 1, n, m, sf[N], pr[N], R, L;
ll x, y, k, otsum, dg, dsum, idx;
string s, s1, s2, ye = "YES", no = "NO";
pairll ar[N];

priority_queue<ll> le;
priority_queue<ll,vector<ll>,greater<ll> > ri;

bool cmp(pairll a, pairll b){
  return(a.fr+a.sc < b.fr+b.sc);
}

void add(ll val){
  if (le.empty() || le.top() >= val) le.push(val), L += val;
  else ri.push(val), R += val;

  ll ls = le.size(), rs = ri.size();
  //move from left to right
  if (ls > rs+1){
    ll tt = le.top();
    le.pop();
    ri.push(tt);
    L -= tt;
    R += tt;
  }
  //move from right to left
  else if (rs > ls){
    ll tt = ri.top();
    ri.pop();
    le.push(tt);
    L += tt;
    R -= tt;
  }
}

void input(){
  cin >> k >> n;
  repp(i,1,n){
    char A, B;
    ll L, R;
    cin >> A >> L >> B >> R;
    if (L > R) swap(L,R);
    if (A == B) otsum += abs(R-L);
    else{
      otsum++;
      idx++;
      ar[idx] = mp(L,R);
    }
  }
}

void solve(){
  sort(ar+1,ar+idx+1,cmp);
  //build prefix
  L = R = 0;
  repp(i,1,idx){
    add(ar[i].fr);
    add(ar[i].sc);
    pr[i] = R-L;
  }

  //build suffix
  while(le.size()) le.pop();
  while(ri.size()) ri.pop();
  L = R = 0;
  repm(i,idx,1){
    add(ar[i].fr);
    add(ar[i].sc);
    sf[i] = R-L;
  }
  ll ans = LLONG_MAX;
  pr[0] = pr[idx+1] = 0;
  if (k == 1) ans = pr[idx];
  else{
    repp(i,1,idx+1){
      ans = min(ans,pr[i-1]+sf[i]);
      //cout << i << " " << pr[i-1] << " " << sf[i] << endl;
    }
  }
  cout << ans+otsum << endl;
}

int main(){
  ios_base::sync_with_stdio(0);
  cin.tie(NULL);
  cout.tie(NULL);
  //cin >> tc;
  while(tc--){
    input();
    solve();
  }
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 2 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 38 ms 5272 KB Output is correct
13 Correct 77 ms 5160 KB Output is correct
14 Correct 63 ms 4684 KB Output is correct
15 Correct 43 ms 3208 KB Output is correct
16 Correct 34 ms 5176 KB Output is correct
17 Correct 63 ms 5252 KB Output is correct
18 Correct 44 ms 5164 KB Output is correct
19 Correct 67 ms 5224 KB Output is correct
20 Correct 55 ms 5156 KB Output is correct
21 Correct 72 ms 5280 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct

Subtask #4
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct

Subtask #5
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 32 ms 5192 KB Output is correct
26 Correct 60 ms 5072 KB Output is correct
27 Correct 71 ms 5156 KB Output is correct
28 Correct 76 ms 5076 KB Output is correct
29 Correct 73 ms 5124 KB Output is correct
30 Correct 42 ms 3048 KB Output is correct
31 Correct 32 ms 5152 KB Output is correct
32 Correct 63 ms 5244 KB Output is correct
33 Correct 54 ms 5152 KB Output is correct
34 Correct 66 ms 5140 KB Output is correct
35 Correct 42 ms 5220 KB Output is correct
36 Correct 66 ms 5248 KB Output is correct
37 Correct 36 ms 5304 KB Output is correct