题解

#include<bits/stdc++.h>
using namespace std;
int main() {
	int T;
	int anser = 0 ;
	cin >> T;
	if(T<0)T=-T;
	int i = 1 ;
	int te = 1;
	while(T!=0 && !anser){
		if(te == T || (te > T && !((te - T)%2))) anser = i ;
		i++;
		te += i ;
	}
	cout << anser << endl;
	return 0;
}