Submission #1090259

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1090259	2024-09-18T05:55:23 Z	pmqwerty	Magic Tree (CEOI19_magictree)	C++17	Compilation error	0 ms	0 KB

magictree

#include<bits/stdc++.h>
using namespace std;
const int MAXN = 1e5 + 100;
vector<int> a[MAXN];
int v[MAXN];
int w[MAXN];
int d[MAXN];
int n, m, k;
int par[MAXN];
int outdegree[MAXN];
namespace sub1{
    bool check(){
        if (!(n <= 20 && k <= 20)) return 0;
        for (int i = 1; i <= m; i++){
             if (w[i] > 1) return 0;
        }
        return 1;
    }
    int mark[21];
    bool flag = true;
    void dfs(int u, int t){
        if (mark[u]){
            if (d[u] > t){
                flag = false;
            }
        }
        for (int v: a[u]){
             dfs(v, (mark[u] ? d[u]: t));
        }
    }
    void solve(){
        long long ans = 0;
        for (int mask = 0; mask < (1 << m); mask++){
             memset(mark, 0, sizeof(mark));
             for (int i = 0; i < m; i++){
                  if (mask & (1 << i)){
                      mark[v[i + 1]] = true;
                  }
             }
             flag = true;
             dfs(1, 1e9);
             if (flag){
                 ans = max(ans, __builtin_popcount(mask));
             }
        }
        cout << ans << '\n';
    }
}
namespace sub2{
    bool check(){
        for (int i = 1; i <= m; i++){
             if (outdegree[v[i]] != 0) return 0;
        }
        return 1;
    }
    void solve(){
        long long ans = 0;
        for (int i = 1; i <= m; i++){
             ans += w[i];
        }
        cout << ans << '\n';
    }
}
bool sub3_flag = true;
namespace sub3{
    bool check(){
        if (!sub3_flag) return false;
        for (int i = 1; i <= m; i++){
             if (w[i] > 1) return false;
        }
        return true;
    }
    int lis(vector<int> const& a) {
        int n = a.size();
        const int INF = 1e9;
        vector<int> l(n+1, INF);
        l[0] = -INF;
        for (int i = 0; i < n; i++) {
            int last = upper_bound(l.begin(), l.end(), a[i]) - l.begin();
            if (l[last-1] < a[i] && a[i] < l[last])
                l[last] = a[i];
        }

        int ans = 0;
        for (int i = 0; i <= n; i++) {
            if (l[i] < INF)
                ans = i;
        }
        return ans;
    }
    void solve(){
        vector<int> temp(n, 1e9);
        for (int i = 1; i <= m; i++){
             temp[v[i] - 1] = d[i];
        }
        cout << lis(temp) << '\n';
    }
}
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cin >> n >> m >> k;
    for (int i = 2; i <= n; i++){
         int x;
         cin >> x;
         a[x].push_back(i);
         outdegree[x]++;
         sub3_flag &= ((x == (i - 1)));
    }
    for (int i = 1; i <= m; i++){
         cin >> v[i] >> d[i] >> w[i];
    }
    if (sub1::check()) sub1::solve();
    else if (sub2::check()) sub2::solve();
    else if (sub3::check()) sub3::solve();
}

Compilation message

magictree.cpp: In function 'void sub1::solve()':
magictree.cpp:43:57: error: no matching function for call to 'max(long long int&, int)'
   43 |                  ans = max(ans, __builtin_popcount(mask));
      |                                                         ^
In file included from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from magictree.cpp:1:
/usr/include/c++/10/bits/stl_algobase.h:254:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  254 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/10/bits/stl_algobase.h:254:5: note:   template argument deduction/substitution failed:
magictree.cpp:43:57: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   43 |                  ans = max(ans, __builtin_popcount(mask));
      |                                                         ^
In file included from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from magictree.cpp:1:
/usr/include/c++/10/bits/stl_algobase.h:300:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  300 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/10/bits/stl_algobase.h:300:5: note:   template argument deduction/substitution failed:
magictree.cpp:43:57: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   43 |                  ans = max(ans, __builtin_popcount(mask));
      |                                                         ^
In file included from /usr/include/c++/10/algorithm:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:65,
                 from magictree.cpp:1:
/usr/include/c++/10/bits/stl_algo.h:3480:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(std::initializer_list<_Tp>)'
 3480 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/10/bits/stl_algo.h:3480:5: note:   template argument deduction/substitution failed:
magictree.cpp:43:57: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   43 |                  ans = max(ans, __builtin_popcount(mask));
      |                                                         ^
In file included from /usr/include/c++/10/algorithm:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:65,
                 from magictree.cpp:1:
/usr/include/c++/10/bits/stl_algo.h:3486:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(std::initializer_list<_Tp>, _Compare)'
 3486 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/10/bits/stl_algo.h:3486:5: note:   template argument deduction/substitution failed:
magictree.cpp:43:57: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   43 |                  ans = max(ans, __builtin_popcount(mask));
      |                                                         ^