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Submission #338218

# Submission time Handle Problem Language Result Execution time Memory
338218 2020-12-22T18:19:37 Z aryan12 Birthday gift (IZhO18_treearray) C++17
0 / 100
 4 ms 5100 KB 
#include <bits/stdc++.h>
using namespace std;

//for 56 points

const long long N = 2e5 + 10;
vector<long long> g[N];
long long tim = 0;
long long Start[N], End[N];

void dfs(long long node, long long par) {
    Start[node] = ++tim;
    for(long long i = 0; i < g[node].size(); i++) {
        if(g[node][i] != par) {
            dfs(g[node][i], node);
        }
    }
    End[node] = ++tim;
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    long long n, m, q;
    cin >> n >> m >> q;
    for(long long i = 0; i < n - 1; i++) {
        long long v, u;
        cin >> v >> u;
        g[v].push_back(u);
        g[u].push_back(v);
    }
    dfs(1, -1);
    long long a[m + 1];
    for(long long i = 1; i <= m; i++) {
        cin >> a[i];
    }
    for(long long i = 1; i <= q; i++) {
        long long command;
        cin >> command;
        if(command == 1) {
            long long idx, val;
            cin >> idx >> val;
            a[idx] = val;
        }
        else {
            long long l, r, v;
            cin >> l >> r >> v;
            long long f = 0;
            for(long long j = l; j <= r; j++) {
                if(Start[v] < Start[a[j]] && End[v] > End[a[j]]) {
                    cout << j << " " << j << "\n";
                    f = 1;
                    break;
                }
            }
            if(f == 0) {
                cout << "-1 -1" << "\n";
            }
        }
    }
}

Compilation message

treearray.cpp: In function 'void dfs(long long int, long long int)':
treearray.cpp:13:28: 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]
   13 |     for(long long i = 0; i < g[node].size(); i++) {
      |                          ~~^~~~~~~~~~~~~~~~

Subtask #1
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 5100 KB Wrong range.
2 Halted 0 ms 0 KB -

Subtask #2
0 / 18.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 5100 KB Wrong range.
2 Halted 0 ms 0 KB -

Subtask #3
0 / 26.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 5100 KB Wrong range.
2 Halted 0 ms 0 KB -

Subtask #4
0 / 44.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 5100 KB Wrong range.
2 Halted 0 ms 0 KB -