Submission #1368938

#	Time	Username	Problem	Language	Result	Execution time	Memory
1368938		vidux	Rectangles (IOI19_rect)	C++17	Compilation error	0 ms	0 KiB

rect

#include "rect.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

long long count_rectangles(std::vector<std::vector<int> > a) {
	if (n < 3) return 0;
	int n = (int)a.size();
	int m = (int)a[0].size();
	vector<int> ok(m), b = a[1];
	for (int i = 1; i < m-1; i++) ok[i] = (a[0][i] > a[1][i] && a[1][i] < a[2][i]);
	ll ans = 0;
	for (int l = 1; l < m-1; l++) {
		int mn = b[l];
		for (int r = l; r < m-1; r++) {
			if (!ok[r]) break;
			mn = min(mn, b[r]);
			if (b[l-1] > mn && mn < b[r+1]) ans++;
		}
	}
	return ans;
}

Compilation message (stderr)

rect.cpp: In function 'long long int count_rectangles(std::vector<std::vector<int> >)':
rect.cpp:7:13: error: 'n' was not declared in this scope
    7 |         if (n < 3) return 0;
      |             ^