oj.uz

Submission #522869

# Submission time Handle Problem Language Result Execution time Memory
522869 2022-02-06T08:07:49 Z Cross_Ratio Monochrome Points (JOI20_monochrome) C++14
35 / 100
 2000 ms 20780 KB 
#include <bits/stdc++.h>
#define int long long
using namespace std;
struct SegTree {
    vector<int> seg;
    int MAX;
    SegTree(int N) {
        int i;
        for(i=1;i<2*N;i*=2) {}
        seg.resize(i);
        MAX = i;
    }
    void cons() {
        for(int i = MAX/2-1;i>=1;i--) {
            seg[i] = seg[2*i] + seg[2*i+1];
        }
    }
    void update(int n) {
        n += MAX/2;
        n /= 2;
        while(n) {
            seg[n] = seg[2*n] + seg[2*n+1];
            n /= 2;
        }
    }
    void Edit(int n, int a) {
        seg[n+MAX/2] += a;
        update(n);
    }
    int sum(int s, int e, int n, int ns, int ne) {
        if(e<=ns||ne<=s) return 0;
        if(s<=ns&&ne<=e) return seg[n];
        int mid = ns + ne >> 1;
        return sum(s, e, 2*n, ns, mid) + sum(s, e, 2*n+1, mid, ne);
    }
    int sum(int s, int e) {
        return sum(s, e, 1, 0, MAX/2);
    }
};
int simulate(vector<int> V) {
    SegTree tree(V.size()+5);
    vector<int> used;
    used.resize(V.size()/2);
    fill(used.begin(),used.end(),-1);
    int ans = 0;
    int i;
    for(i=0;i<V.size();i++) {
        if(used[V[i]] != -1) {
            ans += tree.sum(used[V[i]]+1, i);
            tree.Edit(used[V[i]],-1);
        }
        else {
            tree.Edit(i, 1);
            used[V[i]] = i;
        }
    }
    return ans;
}
signed main() {
    cin.sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int N;
    string s2;
    cin >> N >> s2;
    int i, j, k;
    vector<int> A, B;
    for(i=0;i<2*N;i++) {
        if(s2[i]=='B') A.push_back(i);
        else B.push_back(i);
    }
    vector<int> V;
    V.resize(s2.length());
    for(i=0;i<A.size();i++) V[A[i]] = i;
    int ans = -1;
    int s = 0, e = N - 1;
    while(e-s>=3) {
        int l = (2*s+e)/3;
        int r = (s+2*e)/3;
        for(int j = l; j < l + N; j++) {
            V[B[j%N]] = j-l;
        }
        int v1 = simulate(V);
        for(int j = r; j < r + N; j++) {
            V[B[j%N]] = j-r;
        }
        int v2 = simulate(V);
        if(v1<v2) s = l;
        else e = r;
    }
    for(i=s;i<=e;i++) {
        for(int j = i; j < i + N; j++) {
            V[B[j%N]] = j-i;
        }
        ans = max(ans, simulate(V));
    }
    cout << ans;
}

Compilation message

monochrome.cpp: In member function 'long long int SegTree::sum(long long int, long long int, long long int, long long int, long long int)':
monochrome.cpp:33:22: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   33 |         int mid = ns + ne >> 1;
      |                   ~~~^~~~
monochrome.cpp: In function 'long long int simulate(std::vector<long long int>)':
monochrome.cpp:47:14: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |     for(i=0;i<V.size();i++) {
      |             ~^~~~~~~~~
monochrome.cpp: In function 'int main()':
monochrome.cpp:74:14: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   74 |     for(i=0;i<A.size();i++) V[A[i]] = i;
      |             ~^~~~~~~~~
monochrome.cpp:66:12: warning: unused variable 'j' [-Wunused-variable]
   66 |     int i, j, k;
      |            ^
monochrome.cpp:66:15: warning: unused variable 'k' [-Wunused-variable]
   66 |     int i, j, k;
      |               ^

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 1 ms 312 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct

Subtask #2
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 1 ms 312 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 3 ms 332 KB Output is correct
15 Correct 2 ms 312 KB Output is correct
16 Correct 2 ms 332 KB Output is correct
17 Correct 2 ms 352 KB Output is correct
18 Correct 2 ms 332 KB Output is correct
19 Correct 2 ms 312 KB Output is correct
20 Correct 2 ms 332 KB Output is correct
21 Correct 2 ms 332 KB Output is correct
22 Correct 2 ms 332 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 2 ms 332 KB Output is correct
25 Correct 2 ms 332 KB Output is correct
26 Correct 2 ms 332 KB Output is correct
27 Correct 2 ms 332 KB Output is correct
28 Correct 2 ms 332 KB Output is correct
29 Correct 2 ms 332 KB Output is correct
30 Correct 2 ms 352 KB Output is correct
31 Correct 3 ms 304 KB Output is correct
32 Correct 2 ms 332 KB Output is correct
33 Correct 2 ms 332 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 1 ms 312 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 3 ms 332 KB Output is correct
15 Correct 2 ms 312 KB Output is correct
16 Correct 2 ms 332 KB Output is correct
17 Correct 2 ms 352 KB Output is correct
18 Correct 2 ms 332 KB Output is correct
19 Correct 2 ms 312 KB Output is correct
20 Correct 2 ms 332 KB Output is correct
21 Correct 2 ms 332 KB Output is correct
22 Correct 2 ms 332 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 2 ms 332 KB Output is correct
25 Correct 2 ms 332 KB Output is correct
26 Correct 2 ms 332 KB Output is correct
27 Correct 2 ms 332 KB Output is correct
28 Correct 2 ms 332 KB Output is correct
29 Correct 2 ms 332 KB Output is correct
30 Correct 2 ms 352 KB Output is correct
31 Correct 3 ms 304 KB Output is correct
32 Correct 2 ms 332 KB Output is correct
33 Correct 2 ms 332 KB Output is correct
34 Correct 17 ms 440 KB Output is correct
35 Correct 17 ms 444 KB Output is correct
36 Correct 16 ms 460 KB Output is correct
37 Correct 16 ms 436 KB Output is correct
38 Correct 14 ms 460 KB Output is correct
39 Correct 16 ms 452 KB Output is correct
40 Correct 15 ms 460 KB Output is correct
41 Correct 17 ms 440 KB Output is correct
42 Correct 16 ms 460 KB Output is correct
43 Correct 16 ms 460 KB Output is correct
44 Correct 17 ms 452 KB Output is correct
45 Correct 17 ms 460 KB Output is correct
46 Correct 17 ms 460 KB Output is correct
47 Correct 16 ms 440 KB Output is correct
48 Correct 14 ms 444 KB Output is correct
49 Correct 14 ms 460 KB Output is correct
50 Correct 15 ms 460 KB Output is correct
51 Correct 15 ms 460 KB Output is correct
52 Correct 16 ms 440 KB Output is correct

Subtask #4
0.0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 1 ms 312 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 3 ms 332 KB Output is correct
15 Correct 2 ms 312 KB Output is correct
16 Correct 2 ms 332 KB Output is correct
17 Correct 2 ms 352 KB Output is correct
18 Correct 2 ms 332 KB Output is correct
19 Correct 2 ms 312 KB Output is correct
20 Correct 2 ms 332 KB Output is correct
21 Correct 2 ms 332 KB Output is correct
22 Correct 2 ms 332 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 2 ms 332 KB Output is correct
25 Correct 2 ms 332 KB Output is correct
26 Correct 2 ms 332 KB Output is correct
27 Correct 2 ms 332 KB Output is correct
28 Correct 2 ms 332 KB Output is correct
29 Correct 2 ms 332 KB Output is correct
30 Correct 2 ms 352 KB Output is correct
31 Correct 3 ms 304 KB Output is correct
32 Correct 2 ms 332 KB Output is correct
33 Correct 2 ms 332 KB Output is correct
34 Correct 17 ms 440 KB Output is correct
35 Correct 17 ms 444 KB Output is correct
36 Correct 16 ms 460 KB Output is correct
37 Correct 16 ms 436 KB Output is correct
38 Correct 14 ms 460 KB Output is correct
39 Correct 16 ms 452 KB Output is correct
40 Correct 15 ms 460 KB Output is correct
41 Correct 17 ms 440 KB Output is correct
42 Correct 16 ms 460 KB Output is correct
43 Correct 16 ms 460 KB Output is correct
44 Correct 17 ms 452 KB Output is correct
45 Correct 17 ms 460 KB Output is correct
46 Correct 17 ms 460 KB Output is correct
47 Correct 16 ms 440 KB Output is correct
48 Correct 14 ms 444 KB Output is correct
49 Correct 14 ms 460 KB Output is correct
50 Correct 15 ms 460 KB Output is correct
51 Correct 15 ms 460 KB Output is correct
52 Correct 16 ms 440 KB Output is correct
53 Execution timed out 2075 ms 20780 KB Time limit exceeded
54 Halted 0 ms 0 KB -