Submission #129473

#	Time	Username	Problem	Language	Result	Execution time	Memory
129473		E869120	Binary Subsequences (info1cup17_binary)	C++14	0 / 100	1057 ms	4228 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;
		cout << euler(A + 2) << endl;

		string str = "";

		for (int j = 1; j <= A + 2; j++) {
			if (gcd(j, A + 2) >= 2) continue;
			int t1 = j, t2 = (A + 2) - j; string V = "";
			while (t1 >= 1 && t2 >= 1) {
				if (t1 < t2) {
					V += "0"; t2 -= t1;
				}
				else {
					V += "1"; t1 -= t2;
				}
			}
			V = V.substr(0, V.size() - 1);
			if (str == "" || V.size() < str.size()) str = V;
		}
		for (int j = 0; j < str.size(); j++) {
			if (j) cout << " "; cout << str[j];
		}
		cout << endl;
	}
	return 0;
}

Compilation message (stderr)

binary.cpp: In function 'int main()':
binary.cpp:40:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int j = 0; j < str.size(); j++) {
                   ~~^~~~~~~~~~~~
binary.cpp:41:4: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
    if (j) cout << " "; cout << str[j];
    ^~
binary.cpp:41:24: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
    if (j) cout << " "; cout << str[j];
                        ^~~~

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