Submission #886541

#	Time	Username	Problem	Language	Result	Execution time	Memory
886541		dubabuba	Sandcastle 2 (JOI22_ho_t5)	C++14	0 / 100	12 ms	584 KiB

Main

#include <iostream>
#include <vector>
using namespace std;

const int mxn = 1e5 + 10;
int n, m, a[mxn];

int main() {
	cin >> n >> m;
	if(n > 1) return 1;
	for(int i = 0; i < m; i++)
		cin >> a[i];

	vector<int> sus = {0};
	for(int i = 1; i < m - 1; i++) {
		if(a[i] > a[i - 1] && a[i] > a[i + 1]) sus.push_back(i);
		if(a[i] < a[i - 1] && a[i] < a[i + 1]) sus.push_back(i);
	}
	sus.push_back(m - 1);

	int ans = 0;
	for(int i = 1; i < sus.size(); i++) {
		int l = sus[i - 1];
		int r = sus[i];
		ans += (r - l + 1) * (r - l) / 2;
	}
	cout << ans + m << '\n';
	return 0;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:22:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |  for(int i = 1; i < sus.size(); i++) {
      |                 ~~^~~~~~~~~~~~

• Subtask 1: 0 / 9
• Subtask 2: 0 / 10
• Subtask 3: 0 / 5
• Subtask 4: 0 / 56
• Subtask 5: 0 / 20