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Submission #1070081

# Submission time Handle Problem Language Result Execution time Memory
1070081 2024-08-22T11:32:57 Z vjudge1 Sprinklers (CEOI24_sprinklers) C++17
26 / 100
 38 ms 9156 KB 
#include <bits/stdc++.h>
#define int long long

using namespace std;

void solve() {
   int n, m;
   cin >> n >> m;
   int s[n], f[m];
   for(int i=0; i<n; ++i) cin >> s[i];
   for(int i=0; i<m; ++i) cin >> f[i];
   if(n == 1) {
        if(f[0] < s[0] && f[m-1] > s[0]) {
            cout << -1 << endl;
            return;
        }
        cout << max(abs(f[0]-s[0]), abs(f[m-1]-s[0])) << endl;
        if(f[0] < s[0]) cout << "L" << endl;
        else cout << "R" << endl;
   } else if(n <= 10 && m <= 1000) {
       string ans = "";
       int cur = -1;
       for(int i=0; i<(1LL<<n); ++i) {
            string tmp = "";
            int cnt = 0;
            for(int j=0; j<n; ++j) {
                if((1LL<<j)&i) tmp += "R";
                else tmp += "L";
            }
            for(int j=0; j<m; ++j) {
                bool found = 0;
                int tmp2 = INT_MAX;
                for(int k=0; k<n; ++k) {
                    if(s[k] >= f[j] && tmp[k] == 'L') {
                        tmp2 = min(tmp2, s[k] - f[j]);
                        found = 1;
                        break;
                    }
                }
                for(int k=n-1; k>=0; --k) {
                    if(s[k] <= f[j] && tmp[k] == 'R') {
                        tmp2 = min(tmp2, f[j] - s[k]);
                        found = 1;
                        break;
                    }
                }
                if(!found) {
                    cnt = -1;
                    break;
                } else cnt = max(cnt, tmp2);
            }
            if(cnt != -1) {
                if(cur == -1 or cnt < cur) {
                    cur = cnt;
                    ans = tmp;
                }
            }
       }
       if(cur == -1) cout << cur << endl;
       else cout << cur << endl << ans << endl;
   } else {
       bool tc = 1;
       if(n%3==0) {
            for(int i=0; i<n/3; ++i) {
                if(s[3*i+1]!=s[3*i+2] or s[3*i+1]!=s[3*i+3]) tc = 0;
            }
       } else tc = 0;
       if(!tc) { // k <= 8
           for(int k=0; k<=8; ++k) {
               bool imp = 0;
               int last = 0, R = -1;
               vector<char>ans(n, 'L');
               for(int i=0; i<m; ++i) {
                    if(f[i] <= R) continue;
                    if(last == n) {
                        imp = 1;
                        break;
                    }
                    if(s[last] <= f[i]) {
                        while(s[last]+k < f[i] && last < n) ++last;
                        if(last == n or s[last] > f[i]) {
                            imp = 1;
                            break;
                        }
                        ans[last] = 'R';
                        R = s[last] + k;
                        ++last;
                    } else {
                        if(s[last] - k > f[i]) {
                            imp = 1;
                            break;
                        }
                        ++last;
                    }
               }
               if(imp) continue;
               cout << k << endl;
               for(int i=0; i<n; ++i) cout << ans[i];
               cout << endl;
               return;
           }
       }
       vector<pair<int,bool>>v;
       for(int i=0; i<n; ++i) v.push_back({s[i], 1});
       for(int i=0; i<m; ++i) v.push_back({f[i], 0});
       sort(v.begin(), v.end());
       int ans = 0, prev = -1;
       vector<int>L(n+m, -1), R(n+m, -1);
       for(int i=0; i<n+m; ++i) {
            if(v[i].second) prev = v[i].first;
            else L[i] = prev;
       }
       prev = -1;
       for(int i=n+m-1; i>=0; --i) {
            if(v[i].second) prev = v[i].first;
            else R[i] = prev;
       }
       for(int i=0; i<n+m; ++i) {
            if(v[i].second) continue;
            if(L[i] == -1 && R[i] == -1) {
                cout << -1 << endl;
                return;
            }
            if(R[i] == -1) ans = max(ans, v[i].first - L[i]);
            else if(L[i] == -1) ans = max(ans, R[i] - v[i].first);
            else ans = max(ans, min(v[i].first - L[i], R[i] - v[i].first));
       }
       cout << ans << endl;
       for(int i=0; i<n; i+=3) cout << "LLR";
       cout << endl;
   }
}

signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);

    int t = 1;
    while(t--) solve();
}

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Correct
2 Correct 0 ms 348 KB Correct

Subtask #1
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Correct
2 Correct 6 ms 1104 KB Correct
3 Correct 1 ms 348 KB Correct
4 Correct 7 ms 1116 KB Correct
5 Correct 8 ms 1116 KB Correct
6 Correct 0 ms 348 KB Correct
7 Correct 0 ms 348 KB Correct
8 Correct 2 ms 348 KB Correct
9 Correct 0 ms 348 KB Correct

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Correct
2 Correct 18 ms 4304 KB Correct
3 Correct 2 ms 992 KB Correct
4 Correct 37 ms 8524 KB Correct
5 Correct 35 ms 8860 KB Correct
6 Correct 0 ms 348 KB Correct
7 Correct 0 ms 348 KB Correct
8 Correct 24 ms 8272 KB Correct
9 Correct 33 ms 8980 KB Correct
10 Correct 38 ms 9156 KB Correct
11 Correct 12 ms 4304 KB Correct
12 Correct 17 ms 5332 KB Correct
13 Correct 21 ms 8400 KB Correct
14 Correct 22 ms 7628 KB Correct
15 Correct 26 ms 6852 KB Correct
16 Correct 20 ms 6864 KB Correct

Subtask #3
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Correct
2 Correct 0 ms 348 KB Correct
3 Correct 5 ms 348 KB Correct
4 Correct 1 ms 344 KB Correct
5 Correct 10 ms 348 KB Correct
6 Correct 10 ms 344 KB Correct
7 Correct 0 ms 348 KB Correct
8 Correct 10 ms 344 KB Correct
9 Correct 10 ms 344 KB Correct
10 Correct 10 ms 464 KB Correct
11 Correct 2 ms 348 KB Correct
12 Correct 10 ms 464 KB Correct
13 Correct 10 ms 348 KB Correct
14 Correct 1 ms 348 KB Correct
15 Correct 15 ms 348 KB Correct
16 Correct 7 ms 344 KB Correct
17 Correct 7 ms 456 KB Correct
18 Correct 7 ms 452 KB Correct
19 Correct 0 ms 348 KB Correct
20 Correct 0 ms 348 KB Correct

Subtask #4
0.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Correct
2 Incorrect 20 ms 4564 KB Incorrect string length
3 Halted 0 ms 0 KB -

Subtask #5
0.0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Correct
2 Correct 0 ms 348 KB Correct
3 Correct 6 ms 1104 KB Correct
4 Correct 1 ms 348 KB Correct
5 Correct 7 ms 1116 KB Correct
6 Correct 8 ms 1116 KB Correct
7 Correct 0 ms 348 KB Correct
8 Correct 0 ms 348 KB Correct
9 Correct 2 ms 348 KB Correct
10 Correct 0 ms 348 KB Correct
11 Correct 18 ms 4304 KB Correct
12 Correct 2 ms 992 KB Correct
13 Correct 37 ms 8524 KB Correct
14 Correct 35 ms 8860 KB Correct
15 Correct 0 ms 348 KB Correct
16 Correct 0 ms 348 KB Correct
17 Correct 24 ms 8272 KB Correct
18 Correct 33 ms 8980 KB Correct
19 Correct 38 ms 9156 KB Correct
20 Correct 12 ms 4304 KB Correct
21 Correct 17 ms 5332 KB Correct
22 Correct 21 ms 8400 KB Correct
23 Correct 22 ms 7628 KB Correct
24 Correct 26 ms 6852 KB Correct
25 Correct 20 ms 6864 KB Correct
26 Correct 5 ms 348 KB Correct
27 Correct 1 ms 344 KB Correct
28 Correct 10 ms 348 KB Correct
29 Correct 10 ms 344 KB Correct
30 Correct 0 ms 348 KB Correct
31 Correct 10 ms 344 KB Correct
32 Correct 10 ms 344 KB Correct
33 Correct 10 ms 464 KB Correct
34 Correct 2 ms 348 KB Correct
35 Correct 10 ms 464 KB Correct
36 Correct 10 ms 348 KB Correct
37 Correct 1 ms 348 KB Correct
38 Correct 15 ms 348 KB Correct
39 Correct 7 ms 344 KB Correct
40 Correct 7 ms 456 KB Correct
41 Correct 7 ms 452 KB Correct
42 Correct 0 ms 348 KB Correct
43 Correct 0 ms 348 KB Correct
44 Incorrect 20 ms 4564 KB Incorrect string length
45 Halted 0 ms 0 KB -