Submission #681794

#	Time	Username	Problem	Language	Result	Execution time	Memory
681794		kthng	Untitled (POI11_tem)	C++17	0 / 100	217 ms	26948 KiB

Main

#include<iostream>
#include<deque>

using namespace std;

int a[1000000][2], n;
deque<int> dq;

int main() {
	scanf("%d", &n);
	int ret = 1;
	for (int i = 0; i < n; i++) scanf("%d%d", &a[i][0], &a[i][1]);
	for (int i = 0; i < n; i++) {
		if (i && a[i - 1][0] > a[i][1]) dq.clear();
		if (!dq.empty() && a[i][1] < a[dq.front()][0]) dq.pop_front();
		if (!dq.empty()) ret = max(ret, i - dq.front() + 1);
		if (!dq.empty() && a[i][0] < a[dq.back()][0]) dq.pop_back();
		dq.push_back(i);
	}
	printf("%d\n", ret);

	return 0;
}

Compilation message (stderr)

tem.cpp: In function 'int main()':
tem.cpp:10:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |  scanf("%d", &n);
      |  ~~~~~^~~~~~~~~~
tem.cpp:12:35: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |  for (int i = 0; i < n; i++) scanf("%d%d", &a[i][0], &a[i][1]);
      |                              ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

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