oj.uz

Submission #522871

# Submission time Handle Problem Language Result Execution time Memory
522871 2022-02-06T08:23:32 Z Cross_Ratio Monochrome Points (JOI20_monochrome) C++14
100 / 100
 1347 ms 15564 KB 
#include <bits/stdc++.h>
#define int long long
using namespace std;
struct SegTree {
    vector<int> seg;
    int MAX;
    SegTree(int N) {
        seg.resize(N+5);
        MAX = N+5;
    }
    int sum(int i) {
        int ans = 0;
        while(i>0) {
            //cout << i << ' ' << ans << '\n';
            ans += seg[i];
            i -= (i&-i);
        }
        return ans;
    }
    void Edit(int i, int a) {
        i++;
        while(i<MAX) {
            //cout << i << '\n';
            seg[i] += a;
            i += (i & -i);
        }
    }
    int sum(int s, int e) {
        return sum(e)-sum(s);
    }
};
int simulate(vector<int> V) {
    //cout << "simul\n";
    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 function 'long long int simulate(std::vector<long long int>)':
monochrome.cpp:40:14: 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]
   40 |     for(i=0;i<V.size();i++) {
      |             ~^~~~~~~~~
monochrome.cpp: In function 'int main()':
monochrome.cpp:67:14: 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]
   67 |     for(i=0;i<A.size();i++) V[A[i]] = i;
      |             ~^~~~~~~~~
monochrome.cpp:59:12: warning: unused variable 'j' [-Wunused-variable]
   59 |     int i, j, k;
      |            ^
monochrome.cpp:59:15: warning: unused variable 'k' [-Wunused-variable]
   59 |     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 332 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 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 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 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 332 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 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 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 1 ms 332 KB Output is correct
22 Correct 1 ms 332 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 1 ms 332 KB Output is correct
25 Correct 1 ms 312 KB Output is correct
26 Correct 1 ms 332 KB Output is correct
27 Correct 1 ms 332 KB Output is correct
28 Correct 1 ms 332 KB Output is correct
29 Correct 1 ms 332 KB Output is correct
30 Correct 1 ms 332 KB Output is correct
31 Correct 1 ms 332 KB Output is correct
32 Correct 1 ms 332 KB Output is correct
33 Correct 1 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 332 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 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 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 1 ms 332 KB Output is correct
22 Correct 1 ms 332 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 1 ms 332 KB Output is correct
25 Correct 1 ms 312 KB Output is correct
26 Correct 1 ms 332 KB Output is correct
27 Correct 1 ms 332 KB Output is correct
28 Correct 1 ms 332 KB Output is correct
29 Correct 1 ms 332 KB Output is correct
30 Correct 1 ms 332 KB Output is correct
31 Correct 1 ms 332 KB Output is correct
32 Correct 1 ms 332 KB Output is correct
33 Correct 1 ms 332 KB Output is correct
34 Correct 5 ms 432 KB Output is correct
35 Correct 4 ms 440 KB Output is correct
36 Correct 5 ms 460 KB Output is correct
37 Correct 5 ms 440 KB Output is correct
38 Correct 3 ms 460 KB Output is correct
39 Correct 4 ms 464 KB Output is correct
40 Correct 3 ms 332 KB Output is correct
41 Correct 4 ms 332 KB Output is correct
42 Correct 4 ms 460 KB Output is correct
43 Correct 4 ms 460 KB Output is correct
44 Correct 4 ms 460 KB Output is correct
45 Correct 4 ms 460 KB Output is correct
46 Correct 4 ms 460 KB Output is correct
47 Correct 4 ms 460 KB Output is correct
48 Correct 4 ms 460 KB Output is correct
49 Correct 4 ms 460 KB Output is correct
50 Correct 4 ms 460 KB Output is correct
51 Correct 4 ms 460 KB Output is correct
52 Correct 4 ms 460 KB Output is correct

Subtask #4
65.0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 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 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 1 ms 332 KB Output is correct
22 Correct 1 ms 332 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 1 ms 332 KB Output is correct
25 Correct 1 ms 312 KB Output is correct
26 Correct 1 ms 332 KB Output is correct
27 Correct 1 ms 332 KB Output is correct
28 Correct 1 ms 332 KB Output is correct
29 Correct 1 ms 332 KB Output is correct
30 Correct 1 ms 332 KB Output is correct
31 Correct 1 ms 332 KB Output is correct
32 Correct 1 ms 332 KB Output is correct
33 Correct 1 ms 332 KB Output is correct
34 Correct 5 ms 432 KB Output is correct
35 Correct 4 ms 440 KB Output is correct
36 Correct 5 ms 460 KB Output is correct
37 Correct 5 ms 440 KB Output is correct
38 Correct 3 ms 460 KB Output is correct
39 Correct 4 ms 464 KB Output is correct
40 Correct 3 ms 332 KB Output is correct
41 Correct 4 ms 332 KB Output is correct
42 Correct 4 ms 460 KB Output is correct
43 Correct 4 ms 460 KB Output is correct
44 Correct 4 ms 460 KB Output is correct
45 Correct 4 ms 460 KB Output is correct
46 Correct 4 ms 460 KB Output is correct
47 Correct 4 ms 460 KB Output is correct
48 Correct 4 ms 460 KB Output is correct
49 Correct 4 ms 460 KB Output is correct
50 Correct 4 ms 460 KB Output is correct
51 Correct 4 ms 460 KB Output is correct
52 Correct 4 ms 460 KB Output is correct
53 Correct 1275 ms 15444 KB Output is correct
54 Correct 1286 ms 15480 KB Output is correct
55 Correct 1250 ms 14796 KB Output is correct
56 Correct 1184 ms 14976 KB Output is correct
57 Correct 1193 ms 15028 KB Output is correct
58 Correct 1290 ms 15316 KB Output is correct
59 Correct 1196 ms 14796 KB Output is correct
60 Correct 1207 ms 14756 KB Output is correct
61 Correct 1213 ms 14804 KB Output is correct
62 Correct 1223 ms 15032 KB Output is correct
63 Correct 1215 ms 15044 KB Output is correct
64 Correct 1218 ms 14668 KB Output is correct
65 Correct 1176 ms 14084 KB Output is correct
66 Correct 1191 ms 14516 KB Output is correct
67 Correct 1223 ms 14608 KB Output is correct
68 Correct 1150 ms 13868 KB Output is correct
69 Correct 1268 ms 15232 KB Output is correct
70 Correct 1104 ms 13952 KB Output is correct
71 Correct 1183 ms 15324 KB Output is correct
72 Correct 1182 ms 15312 KB Output is correct
73 Correct 1347 ms 15564 KB Output is correct