oj.uz

Submission #999933

# Submission time Handle Problem Language Result Execution time Memory
999933 2024-06-16T10:31:13 Z AdamGS Cultivation (JOI17_cultivation) C++17
55 / 100
 2000 ms 1992 KB 
#include<bits/stdc++.h>
using namespace std;
typedef long double ld;
typedef long long ll;
#define rep(a, b) for(int a = 0; a < (b); ++a)
#define st first
#define nd second
#define pb push_back
#define all(a) a.begin(), a.end()
const ll INF=2e9+7;
const int LIM=307;
pair<ll,ll>T[LIM];
ll tmi[LIM][LIM], tma[LIM][LIM], R, C, n;
vector<pair<ll,ll>>Ci, Di, Ei;
ll solveab(ll a, ll b) {
  ll c=0, d=0, cpd=0, lst=1;
  ll po=0, ko=Ci.size()-1;
  while(po<ko) {
    ll sr=(po+ko)/2;
    if(Ci[sr].st>b) po=sr+1; else ko=sr;
  }
  c=Ci[po].nd;
  po=0; ko=Di.size()-1;
  while(po<ko) {
    ll sr=(po+ko)/2;
    if(Di[sr].st>b) po=sr+1; else ko=sr;
  }
  d=Di[po].nd;
  po=0; ko=(int)Ei.size()-1;
  while(po<ko) {
    ll sr=(po+ko)/2;
    if(Ei[sr].st<b) po=sr+1; else ko=sr;
  }
  if(Ei.size()>0 && Ei[po].st>=b) cpd=max(Ei[po].nd, 0ll);
  return a+b+max(c+d, cpd);
}
ll solvea(ll a) {
  Ci.clear(); Di.clear(); Ei.clear();
  vector<pair<ll,ll>>P;
  rep(i, n) P.pb({T[i].nd, i});
  sort(all(P));
  vector<pair<ll,ll>>Q;
  rep(i, n) {
    Q.pb({max(1ll, T[P[i].nd].st-a), T[P[i].nd].st});
    for(int j=(int)Q.size()-1; j>0; --j) if(Q[j]<Q[j-1]) swap(Q[j], Q[j-1]);
    ll ma=1, mi=0;
    for(auto j : Q) {
      mi=max(mi, j.st-ma-1);
      ma=max(ma, j.nd);
    }
    mi=max(mi, R-ma);
    if(Q[0].st!=1) mi=INF;
    Ci.pb({mi, P[i].st-1});
  }
  Q.clear();
  rep(i, n) {
    Q.pb({max(1ll, T[P[n-i-1].nd].st-a), T[P[n-i-1].nd].st});
    for(int j=(int)Q.size()-1; j>0; --j) if(Q[j]<Q[j-1]) swap(Q[j], Q[j-1]);
    ll ma=1, mi=0;
    for(auto j : Q) {
      mi=max(mi, j.st-ma-1);
      ma=max(ma, j.nd);
    }
    mi=max(mi, R-ma);
    if(Q[0].st!=1) mi=INF;
    Di.pb({mi, C-P[n-i-1].st});
  }
  ll einf=-1;
  rep(xd, 2) {
    rep(i, n) rep(j, n) {
      tmi[i][j]=R+1;
      tma[i][j]=0;
    }
    rep(i, n) {
      for(int j=i+1; j<n; ++j) {
        tmi[i][j]=tmi[i][j-1];
        if(T[P[j].nd].st>=T[P[i].nd].st) tmi[i][j]=min(tmi[i][j], T[P[j].nd].st-a);
      }
    }
    rep(i, n) {
      for(int j=i-1; j>=0; --j) {
        tma[j][i]=tma[j+1][i];
        if(T[P[j].nd].st<=T[P[i].nd].st) tma[j][i]=max(tma[j][i], T[P[j].nd].st);
      }
    }
    rep(j, n) rep(i, j) {
      if(T[P[i].nd].st<=T[P[j].nd].st) {
        if(tmi[i][j-1]<=0) continue;
        else if(tmi[i][j-1]==10*INF || tma[i+1][j]==0) einf=max(einf, abs(P[i].st-P[j].st)-1);
        //Ei.pb({10*INF, abs(P[i].st-P[j].st)-1});
        else if(tmi[i][j-1]-tma[i+1][j]-2>=0) Ei.pb({tmi[i][j-1]-tma[i+1][j]-2, abs(P[i].st-P[j].st)-1});
      }
    }
    reverse(all(P));
  }
  Ei.pb({10*INF, einf});
  sort(all(Ei));
  for(int i=(int)Ei.size()-2; i>=0; --i) Ei[i].nd=max(Ei[i].nd, Ei[i+1].nd);
  vector<ll>A;
  rep(i, n) A.pb(T[i].st);
  sort(all(A));
  ll b=R-A[n-1], apb=0;
  rep(i, n-1) apb=max(apb, A[i+1]-A[i]-1);
  ll ans=INF;
  rep(i, n) {
    ll x=R-T[i].st;
    if(x>=b && a+x>=apb) ans=min(ans, solveab(a, x));
  }
  rep(i, n) rep(j, i) {
    ll x=abs(T[i].st-T[j].st)-1;
    if(x==-1 || x<apb) continue;
    ll y=x-a;
    if(y>=b) ans=min(ans, solveab(a, y));
  }
  return ans;
}
ll solve() {
  ll ans=INF;
  rep(i, n) ans=min(ans, solvea(T[i].st-1));
  return ans;
}
int main() {
  ios_base::sync_with_stdio(0); cin.tie(0);
  cin >> R >> C >> n;
  rep(i, n) cin >> T[i].st >> T[i].nd;
  ll ans=INF;
  rep(i, 4) {
    ans=min(ans, solve());
    rep(j, n) T[j]={C-T[j].nd+1, T[j].st};
    swap(R, C);
  }
  cout << ans << '\n';
}

Compilation message

cultivation.cpp: In function 'll solveab(ll, ll)':
cultivation.cpp:16:23: warning: unused variable 'lst' [-Wunused-variable]
   16 |   ll c=0, d=0, cpd=0, lst=1;
      |                       ^~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 23 ms 604 KB Output is correct
19 Correct 2 ms 604 KB Output is correct
20 Correct 2 ms 564 KB Output is correct
21 Correct 10 ms 712 KB Output is correct
22 Correct 140 ms 860 KB Output is correct
23 Correct 3 ms 604 KB Output is correct
24 Correct 624 ms 1464 KB Output is correct
25 Correct 276 ms 1116 KB Output is correct
26 Execution timed out 2023 ms 1992 KB Time limit exceeded
27 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 23 ms 604 KB Output is correct
19 Correct 2 ms 604 KB Output is correct
20 Correct 2 ms 564 KB Output is correct
21 Correct 10 ms 712 KB Output is correct
22 Correct 140 ms 860 KB Output is correct
23 Correct 3 ms 604 KB Output is correct
24 Correct 624 ms 1464 KB Output is correct
25 Correct 276 ms 1116 KB Output is correct
26 Execution timed out 2023 ms 1992 KB Time limit exceeded
27 Halted 0 ms 0 KB -

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 2 ms 348 KB Output is correct
4 Correct 1 ms 460 KB Output is correct
5 Correct 2 ms 348 KB Output is correct
6 Correct 2 ms 348 KB Output is correct
7 Correct 2 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 2 ms 348 KB Output is correct
12 Correct 2 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 2 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 2 ms 348 KB Output is correct
17 Correct 2 ms 588 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 2 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 2 ms 348 KB Output is correct
4 Correct 1 ms 460 KB Output is correct
5 Correct 2 ms 348 KB Output is correct
6 Correct 2 ms 348 KB Output is correct
7 Correct 2 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 2 ms 348 KB Output is correct
12 Correct 2 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 2 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 2 ms 348 KB Output is correct
17 Correct 2 ms 588 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 2 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 82 ms 860 KB Output is correct
22 Correct 90 ms 856 KB Output is correct
23 Correct 60 ms 952 KB Output is correct
24 Correct 48 ms 856 KB Output is correct
25 Correct 86 ms 860 KB Output is correct
26 Correct 87 ms 956 KB Output is correct
27 Correct 76 ms 856 KB Output is correct
28 Correct 87 ms 856 KB Output is correct
29 Correct 82 ms 856 KB Output is correct
30 Correct 91 ms 952 KB Output is correct
31 Correct 93 ms 860 KB Output is correct
32 Correct 86 ms 956 KB Output is correct
33 Correct 46 ms 860 KB Output is correct
34 Correct 59 ms 856 KB Output is correct
35 Correct 59 ms 860 KB Output is correct
36 Correct 64 ms 856 KB Output is correct

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 23 ms 604 KB Output is correct
19 Correct 2 ms 604 KB Output is correct
20 Correct 2 ms 564 KB Output is correct
21 Correct 10 ms 712 KB Output is correct
22 Correct 140 ms 860 KB Output is correct
23 Correct 3 ms 604 KB Output is correct
24 Correct 624 ms 1464 KB Output is correct
25 Correct 276 ms 1116 KB Output is correct
26 Execution timed out 2023 ms 1992 KB Time limit exceeded
27 Halted 0 ms 0 KB -