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Submission #287846

# Submission time Handle Problem Language Result Execution time Memory
287846 2020-09-01T04:17:21 Z zecookiez Tree Rotations (POI11_rot) C++17
36 / 100
 1000 ms 21496 KB 
#include <bits/stdc++.h>
using namespace std;
template<class C>constexpr int len(const C&c){return int(c.size());}

const int MAXN = 200005;
int N, inp[MAXN], sz[MAXN], L[MAXN], R[MAXN]; long long ans, bit[MAXN];

void update(int pos, int val){
    for(int i = pos; i <= N; i += i & -i) bit[i] += val;
}
long long query(int pos){
    long long tot = 0;
    for(int i = pos; i > 0; i -= i & -i) tot += bit[i];
    return tot;
}

int read_tree(int id){
    cin >> inp[id];
    if(inp[id] != 0){
        L[id] = id;
        R[id] = id;
        sz[id] = 1;
        return id;
    }
    int left = read_tree(id + 1);
    int right = read_tree(left + 1);
    sz[id] = sz[left] + sz[right];
    L[id] = left; R[id] = right;
    return right;
}

vector<int> solve(int id){
    int A = inp[id];
    if(A != 0){
        update(A, 1);
        return {A};
    }
    vector<int> left, right;
    if(sz[L[id]] <= sz[R[id]]){
        left = solve(id + 1);
        for(auto i : left) update(i, -1);
        right = solve(L[id] + 1);
    } else {
        left = solve(L[id] + 1);
        for(auto i : left) update(i, -1);
        right = solve(id + 1);
    }
    long long cur, case1 = 0, case2 = 0;
    for(auto i : left){
        cur = query(i - 1);
        case1 += cur; case2 += len(right) - cur;
    }
    ans += min(case1, case2);
    for(auto i : left) update(i, 1), right.push_back(i);
    return right;
}

int main(){
    cin.sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin >> N; read_tree(0); solve(0); cout << ans << '\n';
    return 0;
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct

Subtask #2
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 512 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 4 ms 640 KB Output is correct

Subtask #4
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 117 ms 1280 KB Output is correct
2 Correct 5 ms 640 KB Output is correct
3 Correct 127 ms 1432 KB Output is correct
4 Correct 185 ms 1528 KB Output is correct

Subtask #5
0 / 9.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1088 ms 3480 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 73 ms 3528 KB Output is correct
2 Execution timed out 1040 ms 7308 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #7
0 / 9.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1090 ms 21496 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #8
0 / 9.0

# Verdict Execution time Memory Grader output
1 Runtime error 26 ms 8064 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #9
0 / 9.0

# Verdict Execution time Memory Grader output
1 Runtime error 26 ms 7672 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #10
0 / 9.0

# Verdict Execution time Memory Grader output
1 Runtime error 29 ms 8576 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #11
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 28 ms 8312 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -