1#include <iostream>
2#include <cmath>
3
4using namespace std;
5
6int main()
7{
8 int x = 15;
9 double result;
10 result = round(x);
11 cout << "round(" << x << ") = " << result << endl;
12
13 return 0;
14}
15
1#include<bits/stdc++.h>
2
3int main() {
4 using namespace std;
5 ios_base::sync_with_stdio(false), cin.tie(nullptr);
6
7 int T; cin >> T;
8 for (int case_num = 1; case_num <= T; case_num ++) {
9
10 int64_t L, R; cin >> L >> R; R++;
11 bool parity = 0;
12 int64_t coeff = 1;
13 int64_t ans = 0;
14 while (L < R) {
15 assert(1 <= L && L < R);
16 auto is_good = [&](int64_t v) {
17 assert(v > 0);
18 bool d = v % 2;
19 while (v > 0) {
20 if (v % 2 != d) return false;
21 d = !d;
22 v /= 10;
23 }
24 return d == 0;
25 };
26 while (L < R && L % 10 != 0) {
27 if (is_good(L)) {
28 ans += coeff;
29 }
30 L++;
31 }
32 while (L < R && R % 10 != 0) {
33 --R;
34 if (is_good(R)) {
35 ans += coeff;
36 }
37 }
38
39 if (L == R) break;
40 assert(L % 10 == 0 && R % 10 == 0);
41 assert(L >= 10);
42
43 L /= 10;
44sorry for the error
1double round(double x);
2float round(float x);
3long double round(long double x);
4double round(T x); // For integral type
5