Submission #130716

#	Time	Username	Problem	Language	Result	Execution time	Memory
130716		nandonathaniel	Ice Hockey World Championship (CEOI15_bobek)	C++14	100 / 100	426 ms	20948 KiB

bobek

#include<bits/stdc++.h>
using namespace std;
typedef long long LL;
const LL MOD=1000000007;

vector<LL> pertama,kedua;
LL a[25],b[25];

int main(){
	ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
	LL n,m,ans=0;
	cin >> n >> m;
	LL first=n/2,second=n-first;
	for(LL i=0;i<first;i++)cin >> a[i];
	for(LL i=0;i<second;i++)cin >> b[i];
	for(LL i=0;i<(1<<first);i++){
		LL brp=0;
		for(LL j=0;j<first;j++){
			if(i & (1<<j))brp+=a[j];
		}
		pertama.push_back(brp);
	}
	for(LL i=0;i<(1<<second);i++){
		LL brp=0;
		for(LL j=0;j<second;j++){
			if(i & (1<<j))brp+=b[j];
		}
		kedua.push_back(brp);
	}
	sort(pertama.begin(),pertama.end());
	sort(kedua.begin(),kedua.end());
	reverse(kedua.begin(),kedua.end());
	LL j=0;
	for(LL i=0;i<pertama.size();i++){
		while(j<kedua.size() && kedua[j]+pertama[i]>m)j++;
		ans+=(kedua.size()-j);
	}
	cout << ans << endl;
	return 0;
}

Compilation message (stderr)

bobek.cpp: In function 'int main()':
bobek.cpp:34:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(LL i=0;i<pertama.size();i++){
             ~^~~~~~~~~~~~~~~
bobek.cpp:35:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   while(j<kedua.size() && kedua[j]+pertama[i]>m)j++;
         ~^~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10