oj.uz

Submission #1039780

# Submission time Handle Problem Language Result Execution time Memory
1039780 2024-07-31T08:53:01 Z 변재우(#10994) Sprinklers (CEOI24_sprinklers) C++17
9 / 100
 96 ms 6024 KB 
#include <bits/stdc++.h>
#define int long long
using namespace std;

const int Nmax=100010;
int N, M, ans=-1, Nt, Mt, At[Nmax], Bt[Nmax];
pair<int, int> A[Nmax], B[Nmax];
int X[Nmax];
char ret[Nmax];

bool chk(int K, bool op) {
    N=M=0, fill(X+1, X+Mt+1, 0);
    for(int i=1; i<=Nt; i++) {
        if(i>1 && At[i]==At[i-1]) {
            if(i==2 || At[i-1]!=At[i-2]) {
                N--;
                auto p=lower_bound(Bt+1, Bt+Mt+1, At[i]-K);
                auto q=upper_bound(Bt+1, Bt+Mt+1, At[i]+K);
                X[p-Bt]++, X[q-Bt]--;
                ret[i-1]='L', ret[i]='R';
            }
        }
        else A[++N]={At[i], i};
    }
    for(int i=1; i<=Mt; i++) {
        X[i]+=X[i-1];
        if(!X[i]) B[++M]={Bt[i], i};
    }
    for(int i=1, j=1; i<=M; i++) {
        if(j>N) return false;
        if(A[j].first<=B[i].first) {
            while(j<=N && A[j].first<B[i].first-K) j++;
            if(j>N) return false;
            if(A[j].first>B[i].first) {i--; continue;}
            while(i<=M && B[i].first<=A[j].first+K) i++; i--;
            ret[A[j].second]='R';
            j++; continue;
        }
        int l=j, r=j;
        while(r<N && A[r+1].first<=B[i].first+K) ++r;
        if(A[l].first>B[i].first+K) return false;
        if(r-l+1==1) {
            while(i<=M && B[i].first<=A[j].first) i++; i--;
            ret[A[j].second]='L';
            j++;
            continue;
        }
        if(r-l+1==2) {
            auto p=upper_bound(B+1, B+M+1, make_pair(A[l].first, (int)INT_MAX));
            if(p<=B+M && (*p).first<A[r].first) {
                if(r<N && A[r+1].first-K>=(*p).first) {
                    while(i<=M && B[i].first<=A[r].first+K) i++; i--;
                    ret[A[j].second]='L', ret[A[j+1].second]='R';
                    j+=2; continue;
                }
                while(i<=M && B[i].first<=A[l].first+K) i++; i--;
                ret[A[j].second]='R', ret[A[j+1].second]='L';
                j+=2; continue;
            }
            else {
                while(i<=M && B[i].first<=A[r].first+K) i++; i--;
                ret[A[j].second]='L', ret[A[j+1].second]='R';
                j+=2; continue;
            }
        }
        ret[A[l].second]='R', ret[A[l+1].second]='L', ret[A[r].second]='R';
        while(i<=M && B[i].first<=A[r].first+K) i++; i--;
        j=r+1;
    }
    if(op) for(int i=1; i<=Nt; i++) cout<<ret[i];
    return true;
}

signed main() {
    ios_base::sync_with_stdio(0); cin.tie(0);
    cin>>Nt>>Mt;
    for(int i=1; i<=Nt; i++) cin>>At[i];
    for(int i=1; i<=Mt; i++) cin>>Bt[i];
    fill(ret+1, ret+Nt+1, 'L');
    for(int s=0, e=1e9; s<=e; ) {
        int mid=(s+e)/2;
        if(chk(mid, false)) ans=mid, e=mid-1;
        else s=mid+1;
    }
    if(ans>=0) cout<<ans<<"\n", chk(ans, true);
    else cout<<-1;
    return 0;
}

Compilation message

Main.cpp: In function 'bool chk(long long int, bool)':
Main.cpp:35:13: warning: this 'while' clause does not guard... [-Wmisleading-indentation]
   35 |             while(i<=M && B[i].first<=A[j].first+K) i++; i--;
      |             ^~~~~
Main.cpp:35:58: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'while'
   35 |             while(i<=M && B[i].first<=A[j].first+K) i++; i--;
      |                                                          ^
Main.cpp:43:13: warning: this 'while' clause does not guard... [-Wmisleading-indentation]
   43 |             while(i<=M && B[i].first<=A[j].first) i++; i--;
      |             ^~~~~
Main.cpp:43:56: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'while'
   43 |             while(i<=M && B[i].first<=A[j].first) i++; i--;
      |                                                        ^
Main.cpp:52:21: warning: this 'while' clause does not guard... [-Wmisleading-indentation]
   52 |                     while(i<=M && B[i].first<=A[r].first+K) i++; i--;
      |                     ^~~~~
Main.cpp:52:66: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'while'
   52 |                     while(i<=M && B[i].first<=A[r].first+K) i++; i--;
      |                                                                  ^
Main.cpp:56:17: warning: this 'while' clause does not guard... [-Wmisleading-indentation]
   56 |                 while(i<=M && B[i].first<=A[l].first+K) i++; i--;
      |                 ^~~~~
Main.cpp:56:62: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'while'
   56 |                 while(i<=M && B[i].first<=A[l].first+K) i++; i--;
      |                                                              ^
Main.cpp:61:17: warning: this 'while' clause does not guard... [-Wmisleading-indentation]
   61 |                 while(i<=M && B[i].first<=A[r].first+K) i++; i--;
      |                 ^~~~~
Main.cpp:61:62: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'while'
   61 |                 while(i<=M && B[i].first<=A[r].first+K) i++; i--;
      |                                                              ^
Main.cpp:67:9: warning: this 'while' clause does not guard... [-Wmisleading-indentation]
   67 |         while(i<=M && B[i].first<=A[r].first+K) i++; i--;
      |         ^~~~~
Main.cpp:67:54: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'while'
   67 |         while(i<=M && B[i].first<=A[r].first+K) i++; i--;
      |                                                      ^

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4440 KB Correct
2 Correct 1 ms 4444 KB Correct

Subtask #1
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4444 KB Correct
2 Correct 10 ms 4952 KB Correct
3 Correct 1 ms 4440 KB Correct
4 Correct 11 ms 4956 KB Correct
5 Correct 13 ms 4952 KB Correct
6 Correct 1 ms 4444 KB Correct
7 Correct 1 ms 4444 KB Correct
8 Correct 2 ms 4444 KB Correct
9 Correct 1 ms 4444 KB Correct

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4440 KB Correct
2 Correct 17 ms 5172 KB Correct
3 Correct 8 ms 4700 KB Correct
4 Correct 96 ms 6012 KB Correct
5 Correct 95 ms 5976 KB Correct
6 Correct 1 ms 4440 KB Correct
7 Correct 1 ms 4444 KB Correct
8 Correct 22 ms 6020 KB Correct
9 Correct 30 ms 5976 KB Correct
10 Correct 44 ms 6024 KB Correct
11 Correct 23 ms 5440 KB Correct
12 Correct 57 ms 5212 KB Correct
13 Correct 65 ms 5772 KB Correct
14 Correct 73 ms 5760 KB Correct
15 Correct 81 ms 5720 KB Correct
16 Correct 58 ms 5724 KB Correct

Subtask #3
0.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4440 KB Correct
2 Correct 1 ms 4444 KB Correct
3 Correct 1 ms 4444 KB Correct
4 Correct 1 ms 4568 KB Correct
5 Correct 1 ms 4444 KB Correct
6 Correct 1 ms 4444 KB Correct
7 Correct 1 ms 4444 KB Correct
8 Correct 1 ms 4444 KB Correct
9 Correct 1 ms 4444 KB Correct
10 Correct 1 ms 4444 KB Correct
11 Correct 1 ms 4444 KB Correct
12 Correct 1 ms 4444 KB Correct
13 Correct 1 ms 4444 KB Correct
14 Incorrect 1 ms 4444 KB User solution is incorrect
15 Halted 0 ms 0 KB -

Subtask #4
0.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4440 KB Correct
2 Correct 15 ms 5212 KB Correct
3 Incorrect 49 ms 5976 KB User solution is incorrect
4 Halted 0 ms 0 KB -

Subtask #5
0.0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4440 KB Correct
2 Correct 1 ms 4444 KB Correct
3 Correct 10 ms 4952 KB Correct
4 Correct 1 ms 4440 KB Correct
5 Correct 11 ms 4956 KB Correct
6 Correct 13 ms 4952 KB Correct
7 Correct 1 ms 4444 KB Correct
8 Correct 1 ms 4444 KB Correct
9 Correct 2 ms 4444 KB Correct
10 Correct 1 ms 4444 KB Correct
11 Correct 17 ms 5172 KB Correct
12 Correct 8 ms 4700 KB Correct
13 Correct 96 ms 6012 KB Correct
14 Correct 95 ms 5976 KB Correct
15 Correct 1 ms 4440 KB Correct
16 Correct 1 ms 4444 KB Correct
17 Correct 22 ms 6020 KB Correct
18 Correct 30 ms 5976 KB Correct
19 Correct 44 ms 6024 KB Correct
20 Correct 23 ms 5440 KB Correct
21 Correct 57 ms 5212 KB Correct
22 Correct 65 ms 5772 KB Correct
23 Correct 73 ms 5760 KB Correct
24 Correct 81 ms 5720 KB Correct
25 Correct 58 ms 5724 KB Correct
26 Correct 1 ms 4444 KB Correct
27 Correct 1 ms 4568 KB Correct
28 Correct 1 ms 4444 KB Correct
29 Correct 1 ms 4444 KB Correct
30 Correct 1 ms 4444 KB Correct
31 Correct 1 ms 4444 KB Correct
32 Correct 1 ms 4444 KB Correct
33 Correct 1 ms 4444 KB Correct
34 Correct 1 ms 4444 KB Correct
35 Correct 1 ms 4444 KB Correct
36 Correct 1 ms 4444 KB Correct
37 Incorrect 1 ms 4444 KB User solution is incorrect
38 Halted 0 ms 0 KB -