Submission #121200

#	Time	Username	Problem	Language	Result	Execution time	Memory
121200		_7_7_	Triangles (CEOI18_tri)	C++14	Compilation error	0 ms	0 KiB

tri

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

using namespace std;

const int N = 1e5 + 11;

int n;
long long *x, *y;
int queries=0;
bool was[N];

static void init() {
	static int is_inited=0;
	if (is_inited)
		return;
	is_inited=1;
	assert(scanf("%d", &n)==1);
	x=(long long*)malloc((n+1)*sizeof(long long));
	y=(long long*)malloc((n+1)*sizeof(long long));
	for (int i=1; i<=n; i++)
		assert(scanf("%lld%lld", &x[i], &y[i])==2);
}

int get_n() {
	init();
	return n;
}

int is_clockwise(int a, int b, int c) {
	init();
	assert(a>=1 && a<=n);
	assert(b>=1 && b<=n);
	assert(c>=1 && c<=n);
	assert(a!=b && a!=c && b!=c);
	queries++;
        if(queries == 1000 * 1000 + 1)
            printf("Too many queries!");
	return (x[b]-x[a])*(y[c]-y[a])-(x[c]-x[a])*(y[b]-y[a])<0;
}

void give_answer(int s) {
	init();
	s = 0;
	for (int i = 1; i <= n; ++i)
		for (int j = 1; j <= n; ++j) {
			if (i == j)
				continue;
			bool ok = 1;
			for (int x = 1; x <= n; ++x) {
				if (i == x || j == x)
					continue;
				if (!is_clockwise(i, j, x)) {
					ok = 0;
					break;
				}				                              
			}
			if (ok) {
				if (!was[i]) {
					++s;
					was[i] = 1;
				}
				if (!was[j]) {
					was[j] = 1;
					++s;
				}
			}
		}
	printf("%d\n", s);
}

Compilation message (stderr)

tri.cpp: In function 'void init()':
tri.cpp:18:9: error: 'scanf' was not declared in this scope
  assert(scanf("%d", &n)==1);
         ^~~~~
tri.cpp:18:2: error: 'assert' was not declared in this scope
  assert(scanf("%d", &n)==1);
  ^~~~~~
tri.cpp:18:2: note: suggested alternative: 'short'
  assert(scanf("%d", &n)==1);
  ^~~~~~
  short
tri.cpp:19:16: error: 'malloc' was not declared in this scope
  x=(long long*)malloc((n+1)*sizeof(long long));
                ^~~~~~
tri.cpp: In function 'int is_clockwise(int, int, int)':
tri.cpp:32:2: error: 'assert' was not declared in this scope
  assert(a>=1 && a<=n);
  ^~~~~~
tri.cpp:32:2: note: suggested alternative: 'short'
  assert(a>=1 && a<=n);
  ^~~~~~
  short
tri.cpp:38:13: error: 'printf' was not declared in this scope
             printf("Too many queries!");
             ^~~~~~
tri.cpp:38:13: note: suggested alternative: 'int'
             printf("Too many queries!");
             ^~~~~~
             int
tri.cpp: In function 'void give_answer(int)':
tri.cpp:69:2: error: 'printf' was not declared in this scope
  printf("%d\n", s);
  ^~~~~~
tri.cpp:69:2: note: suggested alternative: 'int'
  printf("%d\n", s);
  ^~~~~~
  int