Submission #993455

#	Time	Username	Problem	Language	Result	Execution time	Memory
993455		THXuan	September (APIO24_september)	C++17	45 / 100	126 ms	37704 KiB

september

#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);
//cout << i << " "<< F[i] << "\n";
}
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 j = dp[S[0][i]];
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:28:16: 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:33:9: 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()){
      |       ~~^~~~~~~~~~~~~
september.cpp:34:5: warning: unused variable 'j' [-Wunused-variable]
   34 | int j = dp[S[0][i]];
      |     ^

• 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