Submission #422784

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
422784	2021-06-10 12:17:54	alireza_kaviani	Highway Tolls (IOI18_highway)	C++11	51 / 100	286 ms	15476 KiB

highway

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#include "highway.h"
#include <bits/stdc++.h>
using namespace std;
typedef pair<int, int> pii;
const int MAXN = 2e5 + 10;
int n , timer , st[MAXN] , prv[MAXN];
vector<pii> adj[MAXN];
vector<int> get(int x){
  vector<int> ans(n - 1 , 0);
  for(int i = 0 ; i < n ; i++){
    if(st[i] >= x)  ans[prv[i]] = 1;
  }
  return ans;
}
void DFS(int v , int p = -1){
  st[v] = ++timer;
  for(pii i : adj[v]){
    int u = i.first , w = i.second;
    if(u == p)  continue;
    prv[u] = w;
    DFS(u , v);
  }
}
int solve(int root){
  fill(st , st + MAXN , 0);
 
 
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Compilation message (stderr)

highway.cpp: In function 'int solve(int)':
highway.cpp:36:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   36 |   int mid = l + r >> 1;
      |             ~~^~~
highway.cpp: In function 'void find_pair(int, std::vector<int>, std::vector<int>, int, int)':
highway.cpp:44:14: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   44 |  if(U.size() != N - 1) return; n = N;
      |     ~~~~~~~~~^~~~~~~~
highway.cpp:44:2: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   44 |  if(U.size() != N - 1) return; n = N;
      |  ^~
highway.cpp:44:32: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   44 |  if(U.size() != N - 1) return; n = N;
      |                                ^
highway.cpp: In function 'int solve(int)':
highway.cpp:41:1: warning: control reaches end of non-void function [-Wreturn-type]
   41 | }
      | ^

• Subtask 1: 5 / 5
• Subtask 2: 7 / 7
• Subtask 3: 6 / 6
• Subtask 4: 33 / 33
• Subtask 5: 0 / 18
• Subtask 6: 0 / 31