Submission #867529

#	Time	Username	Problem	Language	Result	Execution time	Memory
867529		pizzamoeger	popa (BOI18_popa)	C++14	Compilation error	0 ms	0 KiB

popa

#include <bits/stdc++.h>
#include "popa.h"

int solve(int N, int* Left, int* Right) {
	vector<int> parent (N, -1);
	
	for (int i = 0; i < N; i++) {
		Left[i] = -1;
		Right[i] = -1;
	}

	int rl = 0;
	for (int i = 1; i < N; i++) {
		int v = rl;
		while(parent[v] != -1 && query(i, i, i, v)) {
			v = parent[v];
		}

		if (parent[v] == -1) {
			if (query(i, i, i, v)) {
				parent[v] = i;
				Left[i] = v;
				rl = i;
			} else {
				parent[i] = v;
				Left[i] = Right[v];
				Right[v] = i;
				rl = i;
			}
		} else {
			parent[i] = v;
			Left[i] = Right[v];
			Right[v] = i;
			rl = i;
		}
	}

	int root = rl;
	while (parent[root] != -1) root = parent[root];
	return root;
}

/*signed main() {
	const int N = 6;
	int* Left = new int[N];
	int* Right = new int[N];
	int ret = solve(N, Left, Right);
	cerr << ret;

	for (int i = 0; i < N; i++) {
		cout << Left[i] << " " << Right[i] << "\n";
	}

	return 0;
}*/

Compilation message (stderr)

popa.cpp: In function 'int solve(int, int*, int*)':
popa.cpp:5:2: error: 'vector' was not declared in this scope; did you mean 'std::vector'?
    5 |  vector<int> parent (N, -1);
      |  ^~~~~~
      |  std::vector
In file included from /usr/include/c++/10/vector:67,
                 from /usr/include/c++/10/queue:61,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:86,
                 from popa.cpp:1:
/usr/include/c++/10/bits/stl_vector.h:389:11: note: 'std::vector' declared here
  389 |     class vector : protected _Vector_base<_Tp, _Alloc>
      |           ^~~~~~
popa.cpp:5:9: error: expected primary-expression before 'int'
    5 |  vector<int> parent (N, -1);
      |         ^~~
popa.cpp:15:9: error: 'parent' was not declared in this scope
   15 |   while(parent[v] != -1 && query(i, i, i, v)) {
      |         ^~~~~~
popa.cpp:19:7: error: 'parent' was not declared in this scope
   19 |   if (parent[v] == -1) {
      |       ^~~~~~
popa.cpp:39:9: error: 'parent' was not declared in this scope
   39 |  while (parent[root] != -1) root = parent[root];
      |         ^~~~~~