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Submission #1020653

# Submission time Handle Problem Language Result Execution time Memory
1020653 2024-07-12T08:05:51 Z fimh Tree Rotations (POI11_rot) C++17
0 / 100
 3 ms 1628 KB 
#include <bits/stdc++.h>
//  #include "D:/debug.h"
using namespace std;
 
const int MAXN = 1e4 + 5;
 
// #define int long long
 
int n;
int g[MAXN][2];
int sz[MAXN];
long long dp[MAXN];
int a[MAXN];
 
struct fenwick_tree {
    int bit[MAXN + 5];
    void update(int pos, int v) {
        while(pos <= n) {
            bit[pos] += v;
            pos += (pos & (-pos));
        }
    }
    int get(int pos) {
        int ans = 0;
        while(pos) {
            ans += bit[pos];
            pos -= (pos & (-pos));
        }
        return ans;
    }
    int getR(int l, int r){
        return get(r) - get(l - 1);
    }
} ft;
 
int tdfs = 0, cnt = 0;
 
void build_tree(int u) {
    for(int i=0; i<2; i++) {
        int x;
        cin>>x;
        if(x == 0) {
            tdfs++;
            g[u][i] = tdfs;
            build_tree(tdfs);
        }
        else {
            tdfs++;
            g[u][i] = tdfs;
            a[tdfs] = x;
            cnt++;
        }
        if(cnt == n) return;
    }
}
 
void calsz(int u){
    sz[u] = 1;
    for(int i = 0; i < 2; i++){
        if(g[u][i] != 0) calsz(g[u][i]), sz[u] += sz[g[u][i]];
    }
}
 
void mod(int u, int val){
    ft.update(u, val);
    for(int i = 0; i < 2; i++)
        if(g[u][i] != 0) mod(g[u][i], val);
}
 
long long c1, c2;
void cal(int u){
    if(a[u] != -1){
        c1 += ft.get(a[u] - 1);
        c2 += ft.getR(a[u] + 1, n);
    }
    for(int i = 0; i < 2; i++)
        if(g[u][i] != 0) cal(g[u][i]);
}
 
void dfs(int u){
    int bc = 0;
    for(int i = 0; i < 2; i++){
        if(sz[g[u][i]] > sz[bc]) bc = g[u][i];
    }
    for(int i = 0; i < 2; i++)
        if(g[u][i] != bc && g[u][i] != 0) dfs(g[u][i]), dp[u] += dp[g[u][i]], mod(g[u][i], -1);
    
    if(bc) dfs(bc), dp[u] += dp[bc];
 
    if(a[u] != 0) ft.update(a[u], 1);
    c1 = 0, c2 = 0;
    for(int i = 0; i < 2; i++)
        if(g[u][i] != bc && g[u][i] != 0) cal(g[u][i]);
    
    dp[u] += min(c1,c2);
 
    for(int i = 0; i < 2; i++)
        if(g[u][i] != bc && g[u][i] != 0) mod(g[u][i], 1);
}
 
int main(){
    cin >> n;
    build_tree(0);
    calsz(1);
    dfs(1);
    cout << dp[1];
}

Subtask #1
0 / 9.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 604 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #2
0 / 9.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 348 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #3
0 / 9.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 604 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #4
0 / 9.0

# Verdict Execution time Memory Grader output
1 Runtime error 2 ms 1116 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #5
0 / 9.0

# Verdict Execution time Memory Grader output
1 Runtime error 2 ms 1628 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #6
0 / 9.0

# Verdict Execution time Memory Grader output
1 Runtime error 2 ms 604 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #7
0 / 9.0

# Verdict Execution time Memory Grader output
1 Runtime error 2 ms 1372 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #8
0 / 9.0

# Verdict Execution time Memory Grader output
1 Runtime error 3 ms 860 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 2 ms 604 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 2 ms 1628 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 2 ms 1628 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -