Submission #1195427

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Source Code Expand

#include <bits/stdc++.h>

#define FI(i,a,b) for(int i=(a);i<=(b);i++)
#define FD(i,a,b) for(int i=(a);i>=(b);i--)

#define LL long long
#define Ldouble long double
#define PI 3.1415926535897932384626

#define PII pair<int,int>
#define PLL pair<LL,LL>
#define mp make_pair
#define fi first
#define se second

using namespace std;

LL n;
list<int> L;

int p, q, u[44];

int main(){
	scanf("%lld", &n);
	n++;
	while(n){
		u[p++] = n & 1;
		n >>= 1;
	}
	FD(i, p - 2, 0){
		L.push_back(++q);
		if(u[i]) L.push_front(++q);
	}
	printf("%d\n", q + q);
	FI(i, 1, q) printf("%d ", i);
	FI(i, 1, q){
		printf("%d%c", L.front(), i == q ? '\n':' ');
		L.pop_front();
	}
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:24:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld", &n);
                   ^

Judge Result