Submission #730471

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
730471	2023-04-26 01:59:54	josanneo22	Exam (eJOI20_exam)	C++17	100 / 100	38 ms	6860 KiB

exam

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#include <bits/stdc++.h>
using namespace std;
inline int rd(){
  int x=0,w=1;
  char ch=getchar();
  for(;ch>'9'||ch<'0';ch=getchar()) if(ch=='-') w=-1;
  for(;ch>='0'&&ch<='9';ch=getchar()) x=(x<<1) +(x<<3) +ch-'0';
  return x*w;
}
int main() {
  ios_base::sync_with_stdio(false), cin.tie(nullptr);
  int N=rd();
  vector<int> A(N); for (auto& a : A)a=rd();
  vector<int> B(N); for (auto& b : B)b=rd();
  vector<array<int, 2>> match(N, array<int, 2>{-1, -1});
  for (int z = 0; z < 2; z++) {
    unordered_map<int, int> in_stack;
    vector<int> stk; stk.reserve(N);
    for (int j = 0; j < N; j++) {
      int i = z ? N-1-j : j;
      while (!stk.empty() && stk.back() <= A[i]) {
        in_stack.erase(stk.back());
        stk.pop_back();
      }
      stk.push_back(A[i]);
      in_stack[A[i]] = i;
 
      if (in_stack.count(B[i])) {
        match[i][z] = in_stack[B[i]];
      }
 
 
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Compilation message (stderr)

exam.cpp: In function 'int main()':
exam.cpp:55:11: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wformat=]
   55 |  printf("%d\n",best.size());
      |          ~^    ~~~~~~~~~~~
      |           |             |
      |           int           std::vector<int>::size_type {aka long unsigned int}
      |          %ld

• Subtask 1: 14 / 14
• Subtask 2: 12 / 12
• Subtask 3: 13 / 13
• Subtask 4: 23 / 23
• Subtask 5: 16 / 16
• Subtask 6: 22 / 22