Submission #923787

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
923787	2024-02-07 18:48:10	aykhn	The Xana coup (BOI21_xanadu)	C++17	100 / 100	63 ms	25428 KiB

xanadu

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
#include <bits/stdc++.h>
// author: aykhn
using namespace std;
#define int long long
#define inf 0x3F3F3F3F
const int MXN = 1e5 + 5;
int n;
vector<int> adj[MXN];
int val[MXN], dp[MXN][2][2];
// dp[i][j][k] = j by doing k ops and ok subtree
void dfs(int a, int p)
{
    vector<int> v1;
    int f = 0;
    for (int v : adj[a])
    {
        if (v == p) continue;
        f = 1;
        dfs(v, a);
        v1.push_back(v);
    }
    if (!f)
    {
        if (!val[a]) dp[a][0][0] = 0, dp[a][0][1] = inf, dp[a][1][0] = inf, dp[a][1][1] = 1;
        else dp[a][0][0] = inf, dp[a][0][1] = 1, dp[a][1][0] = 0, dp[a][1][1] = inf;
        return;
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Compilation message (stderr)

xanadu.cpp: In function 'void dfs(long long int, long long int)':
xanadu.cpp:43:27: 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]
   43 |         for (int i = 0; i < nw.size(); i++)
      |                         ~~^~~~~~~~~~~
xanadu.cpp:59:27: 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]
   59 |         for (int i = 0; i < nw.size(); i++)
      |                         ~~^~~~~~~~~~~
xanadu.cpp:75:27: 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]
   75 |         for (int i = 0; i < nw.size(); i++)
      |                         ~~^~~~~~~~~~~
xanadu.cpp:91:27: 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]
   91 |         for (int i = 0; i < nw.size(); i++)
      |                         ~~^~~~~~~~~~~
xanadu.cpp:109:27: 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]
  109 |         for (int i = 0; i < nw.size(); i++)
      |                         ~~^~~~~~~~~~~
xanadu.cpp:125:27: 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]
  125 |         for (int i = 0; i < nw.size(); i++)
      |                         ~~^~~~~~~~~~~
xanadu.cpp:141:27: 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]
  141 |         for (int i = 0; i < nw.size(); i++)
      |                         ~~^~~~~~~~~~~
xanadu.cpp:157:27: 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]
  157 |         for (int i = 0; i < nw.size(); i++)
      |                         ~~^~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 15 / 15
• Subtask 3: 10 / 10
• Subtask 4: 40 / 40
• Subtask 5: 30 / 30