Submission #652150

#	Time	Username	Problem	Language	Result	Execution time	Memory
652150		ymm	Hacker (BOI15_hac)	C++17	Compilation error	0 ms	0 KiB

hac

#define Loop(x,l,r) for (ll x = (l); x < (ll)(r); ++x)
#define LoopR(x,l,r) for (ll x = (r)-1; x >= (ll)(l); --x)
typedef long long ll;
typedef std::pair<int, int> pii;
typedef std::pair<ll , ll > pll;
using namespace std;

const int N = 500'010;
int seg[2*N];

const int inf = 1e9+10;

void up(int l, int r, int x)
{
	l += N;
	r += N;
	while (l < r) {
		if (l&1) {
			seg[l] = min(seg[l], x);
			++l;
		}
		if (r&1) {
			--r;
			seg[r] = min(seg[r], x);
		}
		l /= 2;
		r /= 2;
	}
}

int get(int i)
{
	i += N;
	int ans = inf;
	while (i) {
		ans = min(ans, seg[i]);
		i /= 2;
	}
	return ans;
		
}

int n;
int a[N];
int pre[N];

int main()
{
	cin.tie(0) -> sync_with_stdio(false);
	fill(seg, seg+2*N, inf);
	cin >> n;
	Loop (i,0,n) {
		cin >> a[i];
		pre[i+1] = pre[i] + a[i];
	}
	int len = (n+1)/2;
	Loop (i,0,n) {
		if (i+len <= n) {
			int sum = pre[i+len] - pre[i];
			up(i, i+len, sum);
		} else {
			int sum = pre[n] - pre[i] + pre[i+len-n];
			up(i, n, sum);
			up(0, i+len-n, sum);
		}
	}
	int ans = 0;
	Loop (i,0,n)
		ans = max(ans, get(i));
	cout << ans << '\n';
}

Compilation message (stderr)

hac.cpp:4:14: error: 'pair' in namespace 'std' does not name a template type
    4 | typedef std::pair<int, int> pii;
      |              ^~~~
hac.cpp:1:1: note: 'std::pair' is defined in header '<utility>'; did you forget to '#include <utility>'?
  +++ |+#include <utility>
    1 | #define Loop(x,l,r) for (ll x = (l); x < (ll)(r); ++x)
hac.cpp:5:14: error: 'pair' in namespace 'std' does not name a template type
    5 | typedef std::pair<ll , ll > pll;
      |              ^~~~
hac.cpp:5:9: note: 'std::pair' is defined in header '<utility>'; did you forget to '#include <utility>'?
    5 | typedef std::pair<ll , ll > pll;
      |         ^~~
hac.cpp: In function 'void up(int, int, int)':
hac.cpp:19:13: error: 'min' was not declared in this scope
   19 |    seg[l] = min(seg[l], x);
      |             ^~~
hac.cpp:24:13: error: 'min' was not declared in this scope
   24 |    seg[r] = min(seg[r], x);
      |             ^~~
hac.cpp: In function 'int get(int)':
hac.cpp:36:9: error: 'min' was not declared in this scope
   36 |   ans = min(ans, seg[i]);
      |         ^~~
hac.cpp: In function 'int main()':
hac.cpp:49:2: error: 'cin' was not declared in this scope
   49 |  cin.tie(0) -> sync_with_stdio(false);
      |  ^~~
hac.cpp:1:1: note: 'std::cin' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
  +++ |+#include <iostream>
    1 | #define Loop(x,l,r) for (ll x = (l); x < (ll)(r); ++x)
hac.cpp:50:2: error: 'fill' was not declared in this scope; did you mean 'll'?
   50 |  fill(seg, seg+2*N, inf);
      |  ^~~~
      |  ll
hac.cpp:69:9: error: 'max' was not declared in this scope
   69 |   ans = max(ans, get(i));
      |         ^~~
hac.cpp:70:2: error: 'cout' was not declared in this scope
   70 |  cout << ans << '\n';
      |  ^~~~
hac.cpp:70:2: note: 'std::cout' is defined in header '<iostream>'; did you forget to '#include <iostream>'?