Submission #740080

#	Time	Username	Problem	Language	Result	Execution time	Memory
740080		vjudge1	Fountain Parks (IOI21_parks)	C++17	Compilation error	0 ms	0 KiB

parks

#include "parks.h"
#include<bits/stdc++.h>
const int maxn = 2e5 + 100;
int ord[maxn];

int construct_roads(std::vector<int> x, std::vector<int> y){
    if (x.size() == 1) {
	build({}, {}, {}, {});
        return 1;
    }
    for(int i=0; i<n; i++){
    	ord[i] = i;
	}
//	sort(ord, ord+n, [](int a, int b){
//		return y[a] < y[b];
//	});
	bool ok = 1;
	vector<int>u, v, a, b;
	for(int i=1; i<n; i++){
		if(y[i]-y[i-1] != 2) ok = 0;
		u.push_back(ord[i-1]);
		v.push_back(ord[i]);
		a.push_back(1);
		b.push_back(y[ord[i]]-1);
	}
	if(ok) build(u, v, a, b);
    return ok;
}

Compilation message (stderr)

parks.cpp: In function 'int construct_roads(std::vector<int>, std::vector<int>)':
parks.cpp:11:20: error: 'n' was not declared in this scope
   11 |     for(int i=0; i<n; i++){
      |                    ^
parks.cpp:18:2: error: 'vector' was not declared in this scope
   18 |  vector<int>u, v, a, b;
      |  ^~~~~~
parks.cpp:18:2: note: suggested alternatives:
In file included from /usr/include/c++/10/vector:67,
                 from parks.h:1,
                 from parks.cpp:1:
/usr/include/c++/10/bits/stl_vector.h:389:11: note:   'std::vector'
  389 |     class vector : protected _Vector_base<_Tp, _Alloc>
      |           ^~~~~~
In file included from parks.h:1,
                 from parks.cpp:1:
/usr/include/c++/10/vector:86:13: note:   'std::pmr::vector'
   86 |       using vector = std::vector<_Tp, polymorphic_allocator<_Tp>>;
      |             ^~~~~~
parks.cpp:18:9: error: expected primary-expression before 'int'
   18 |  vector<int>u, v, a, b;
      |         ^~~
parks.cpp:19:17: error: 'n' was not declared in this scope
   19 |  for(int i=1; i<n; i++){
      |                 ^
parks.cpp:21:3: error: 'u' was not declared in this scope
   21 |   u.push_back(ord[i-1]);
      |   ^
parks.cpp:22:3: error: 'v' was not declared in this scope
   22 |   v.push_back(ord[i]);
      |   ^
parks.cpp:23:3: error: 'a' was not declared in this scope
   23 |   a.push_back(1);
      |   ^
parks.cpp:24:3: error: 'b' was not declared in this scope
   24 |   b.push_back(y[ord[i]]-1);
      |   ^
parks.cpp:26:15: error: 'u' was not declared in this scope
   26 |  if(ok) build(u, v, a, b);
      |               ^
parks.cpp:26:18: error: 'v' was not declared in this scope
   26 |  if(ok) build(u, v, a, b);
      |                  ^
parks.cpp:26:21: error: 'a' was not declared in this scope
   26 |  if(ok) build(u, v, a, b);
      |                     ^
parks.cpp:26:24: error: 'b' was not declared in this scope
   26 |  if(ok) build(u, v, a, b);
      |                        ^