Submission #997401

#	Time	Username	Problem	Language	Result	Execution time	Memory
997401		Trisanu_Das	September (APIO24_september)	C++17	16 / 100	230 ms	44328 KiB

september

#include "september.h"
#include <bits/stdc++.h>
using namespace std;
 
int vis[200055], pos[20055];
vector<int>adj[200055], idx[200055];
bool flag = false;

int dfs(int i ){    
    int curr = pos[i];
    vis[i]=1;
    for(auto j : adj[i]) if(!vis[j]) curr = max(curr, dfs(j));
    return curr;
}
int solve(int N, int M, std::vector<int> F, std::vector<std::vector<int>> S) {
    memset(vis, 0, sizeof vis);
    memset(idx, 0, sizeof idx);
    memset(pos, 0, sizeof pos);
    for(int i = 0;i < 2055; i++)if(adj[i].size())adj[i].clear();
    for(int i = 1;i < F.size(); i++)adj[F[i]].push_back(i);
    for(auto i : S[0]) pos[S[0][i]] = i;
    vector<int>vec;
    for(auto i : S[0])vec.push_back(i);
    int cnt = 0;
    for(int i = 0;i < vec.size(); i++){
        int y = 0;
        if(vec[i]==1)flag = true;
        int R_ind = dfs(vec[i]);
        for(int j = i+1; j<=R_ind; j++) R_ind = max(R_ind, dfs(vec[j]));
        i = max(i, R_ind);
        cnt++;
    }
    return cnt;   
}

Compilation message (stderr)

september.cpp: In function 'int solve(int, int, std::vector<int>, std::vector<std::vector<int> >)':
september.cpp:17:30: warning: 'void* memset(void*, int, size_t)' clearing an object of type 'class std::vector<int>' with no trivial copy-assignment; use assignment or value-initialization instead [-Wclass-memaccess]
   17 |     memset(idx, 0, sizeof idx);
      |                              ^
In file included from /usr/include/c++/10/vector:67,
                 from september.h:1,
                 from september.cpp:1:
/usr/include/c++/10/bits/stl_vector.h:389:11: note: 'class std::vector<int>' declared here
  389 |     class vector : protected _Vector_base<_Tp, _Alloc>
      |           ^~~~~~
september.cpp:20:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |     for(int i = 1;i < F.size(); i++)adj[F[i]].push_back(i);
      |                   ~~^~~~~~~~~~
september.cpp:25:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |     for(int i = 0;i < vec.size(); i++){
      |                   ~~^~~~~~~~~~~~
september.cpp:26:13: warning: unused variable 'y' [-Wunused-variable]
   26 |         int y = 0;
      |             ^

• Subtask 1: 11 / 11
• Subtask 2: 0 / 14
• Subtask 3: 5 / 5
• Subtask 4: 0 / 9
• Subtask 5: 0 / 5
• Subtask 6: 0 / 11
• Subtask 7: 0 / 9
• Subtask 8: 0 / 11
• Subtask 9: 0 / 9
• Subtask 10: 0 / 16