oj.uz

답안 #522593

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
522593 2022-02-05T09:11:33 Z Be_dos 홀-짝 수열 (IZhO11_oddeven) C++17
0 / 100
 614 ms 296 KB 
#include <iostream>
#include <cmath>
#include <cctype>
#include <vector>
#include <algorithm>
#include <set>
#include <map>
#include <deque>
#include <stack>
#include <unordered_set>
#include <sstream>
#include <cstring>
#include <iomanip>
#include <queue>
#include <unordered_map>
#include <random>
#include <cfloat>
#include <chrono>
#include <bitset>
#include <complex>
#include <immintrin.h>
#include <cassert>

int64_t int_sqrt(int64_t n) {
    int64_t res = 0;
    for(int64_t i = 1; i * i < n; i++)
        res = i;
    return res + 1;
}

int main() {
    int64_t n;
    std::cin >> n;

    int64_t block = (int_sqrt(1 + 8 * n)) / 2;
    int64_t block_end = block * (block + 1) / 2;
    int64_t block_start = block_end - block + 1;
    std::cout << block_start + (block - 1) * (block - 2) / 2 + (n - block_start) * 2;
    return 0;
}

//0  0        1           3                 6                 10
//1,  2, 4,   5, 7, 9,    10, 12, 14, 16,   17 19 21 23 25    26
//1   2  3    4  5  6     7   8    9  10    11 12 13 14 15    16

Subtask #1
0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 272 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 296 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 2 ms 204 KB Output is correct
8 Correct 10 ms 204 KB Output is correct
9 Correct 24 ms 288 KB Output is correct
10 Correct 61 ms 272 KB Output is correct
11 Correct 289 ms 276 KB Output is correct
12 Correct 614 ms 272 KB Output is correct
13 Incorrect 0 ms 208 KB Output isn't correct
14 Halted 0 ms 0 KB -