n = int(input())
l = 1
r = 2 * 10**50
while l <= r:
m = (l + r) // 2
if((m + 1) * m / 2 >= n):
r = m - 1
else:
l = m + 1
r += 1
print(2 * n - r)
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
27 ms |
18236 KB |
Output is correct |
2 |
Correct |
27 ms |
18208 KB |
Output is correct |
3 |
Correct |
28 ms |
18312 KB |
Output is correct |
4 |
Correct |
27 ms |
18340 KB |
Output is correct |
5 |
Correct |
28 ms |
18236 KB |
Output is correct |
6 |
Correct |
27 ms |
18260 KB |
Output is correct |
7 |
Correct |
27 ms |
18236 KB |
Output is correct |
8 |
Correct |
27 ms |
18228 KB |
Output is correct |
9 |
Correct |
28 ms |
18236 KB |
Output is correct |
10 |
Correct |
29 ms |
18268 KB |
Output is correct |
11 |
Correct |
28 ms |
18236 KB |
Output is correct |
12 |
Correct |
29 ms |
18236 KB |
Output is correct |
13 |
Correct |
27 ms |
18236 KB |
Output is correct |
14 |
Incorrect |
28 ms |
18280 KB |
Output isn't correct |
15 |
Halted |
0 ms |
0 KB |
- |