Submission #998778

#	Time	Username	Problem	Language	Result	Execution time	Memory
998778		THXuan	September (APIO24_september)	C++17	45 / 100	124 ms	35964 KiB

september

#include <bits/stdc++.h>
#include "september.h"
#include <bits/stdc++.h>
#define INF 1e18
using namespace std;
typedef long long ll;
 
vector<int>adj[800005];
int dp[800005];
 
void dfs(int s, int e){
    for(auto u : adj[s]){
        if(u==e) continue;
        dfs(u, s);
        dp[s] = max(dp[s], dp[u]);
    }
}
 
int solve(int N, int M, vector<int> F, vector<vector<int>>S) {
    for(int i = 0;i<N;i++){
        adj[i].clear();
        dp[i] = 0;
    }
    for(int i =1; i < N;i++){
        adj[i].push_back(F[i]);
        adj[F[i]].push_back(i);
    }
    for(int i = 0;i<S[0].size();i++){
        dp[S[0][i]] = i;
    }
    dfs(0, -1);
    int ans = 0; int i=0;
    while(i < S[0].size()){
        int maxn = dp[S[0][i]];
        int k = i;
        while(k <= maxn){
            maxn = max(maxn, dp[S[0][k]]);
            ++k;
        }
        ++ans;
        i = maxn + 1;
    }
    return ans;
}

Compilation message (stderr)

september.cpp: In function 'int solve(int, int, std::vector<int>, std::vector<std::vector<int> >)':
september.cpp:28:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |     for(int i = 0;i<S[0].size();i++){
      |                   ~^~~~~~~~~~~~
september.cpp:33:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |     while(i < S[0].size()){
      |           ~~^~~~~~~~~~~~~

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