Submission #1796309


Source Code Expand

#include <cstdio>
#include <algorithm>

int n, p;
long long int even, odd;
long long int ans;

long long int c(int n, int k){
	long long int res = 1;
	for(int i=0; i<k; ++i){
		res *= (n-i);
		res /= i+1;
	}
	return res;
}

int main(){
	scanf("%d %d", &n, &p);
	for(int i=0; i<n; ++i){
		int a;
		scanf("%d", &a);
		if(a % 2 == 0) ++even;
		else ++odd;
	}
	for(int i=0; 2*i+p<=odd; ++i){
		ans += c(odd, 2*i+p) * ((long long int)1 << even);
	}
	printf("%lld\n", ans);
}

Submission Info

Submission Time
Task A - Biscuits
User Power730
Language C++14 (GCC 5.4.1)
Score 200
Code Size 497 Byte
Status AC
Exec Time 1 ms
Memory 128 KB

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:18:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &n, &p);
                        ^
./Main.cpp:21:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &a);
                  ^

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 200 / 200
Status
AC × 4
AC × 16
Set Name Test Cases
Sample sample1.txt, sample2.txt, sample3.txt, sample4.txt
All sample1.txt, sample2.txt, sample3.txt, sample4.txt, in1.txt, in2.txt, in3.txt, in4.txt, in5.txt, in6.txt, in7.txt, in8.txt, sample1.txt, sample2.txt, sample3.txt, sample4.txt
Case Name Status Exec Time Memory
in1.txt AC 1 ms 128 KB
in2.txt AC 1 ms 128 KB
in3.txt AC 0 ms 128 KB
in4.txt AC 1 ms 128 KB
in5.txt AC 1 ms 128 KB
in6.txt AC 1 ms 128 KB
in7.txt AC 1 ms 128 KB
in8.txt AC 0 ms 128 KB
sample1.txt AC 0 ms 128 KB
sample2.txt AC 0 ms 128 KB
sample3.txt AC 0 ms 128 KB
sample4.txt AC 0 ms 128 KB