Submission #129479

#	Time	Username	Problem	Language	Result	Execution time	Memory
129479		E869120	Binary Subsequences (info1cup17_binary)	C++14	82 / 100	1057 ms	504 KiB

binary

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

int gcd(int a, int b) {
	if (b == 0) return a;
	return gcd(b, a%b);
}

int euler(int pos) {
	int cnt = 0;
	for (int i = 1; i <= pos; i++) {
		if (gcd(i, pos) == 1) cnt++;
	}
	return cnt;
}

int main() {
	int T; cin >> T;
	for (int i = 1; i <= T; i++) {
		int A; cin >> A;
		
		long long cnt = 0, ret = (1 << 30), mask = 0;
		for (int j = 1; j <= A + 2; j++) {
			if (gcd(j, A + 2) >= 2) continue;
			cnt++;

			int t1 = j, t2 = (A + 2) - j; long long mask1 = 0, lens = 0;
			while (t1 >= 1 && t2 >= 1) {
				if (t1 < t2) { t2 -= t1; }
				else { mask1 += (1LL << lens); t1 -= t2; }
				lens++;
			}
			if (ret > lens) {
				ret = lens; mask = mask1;
			}
		}
		cout << cnt << endl;
		for (int j = 0; j < ret - 1; j++) {
			if (j) cout << " "; cout << (mask / (1LL << j)) % 2;
		}
		cout << endl;
	}
	return 0;
}

Compilation message (stderr)

binary.cpp: In function 'int main()':
binary.cpp:40:4: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
    if (j) cout << " "; cout << (mask / (1LL << j)) % 2;
    ^~
binary.cpp:40:24: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
    if (j) cout << " "; cout << (mask / (1LL << j)) % 2;
                        ^~~~

• Subtask 1: 43 / 43
• Subtask 2: 39 / 39
• Subtask 3: 0 / 18