Submission #658788

#	Time	Username	Problem	Language	Result	Execution time	Memory
658788		beaconmc	Ice Hockey World Championship (CEOI15_bobek)	C++14	100 / 100	346 ms	20812 KiB

bobek

#include <bits/stdc++.h>
typedef long long ll;
using namespace std;


#define FOR(i, x, y) for(ll i=x; i<y; i++)
#define FORNEG(i, x, y) for(ll i=x; i>y; i--)


ll sus[41];
int main(){
	ll a,b,n,m;

	vector<ll> aaa, bbb;
	vector<ll> aaa2,bbb2;

	cin >> n >> m;
	FOR(i,0,n) cin >> sus[i];

	a = n/2;
	b = (n-1)/2 + 1;

	FOR(i,0,1<<a){
		ll cur = 0, temp = 0, tempi = i;
		while (tempi){
			if (tempi&1) temp += sus[cur];
			cur++;
			tempi>>=1;
		}
		//aa[temp] += 1;
		aaa.push_back(temp);
	}



	FOR(i,0,1<<b){
		ll cur = a, temp = 0, tempi = i;
		while (tempi){
			if (tempi&1) temp += sus[cur];
			cur++;
			tempi>>=1;
		}

		//bb[temp] += 1;
		bbb.push_back(temp);
	}

	sort(aaa.begin(), aaa.end());
	sort(bbb.begin(), bbb.end());

	ll ans = 0;

	FOR(i,0,aaa.size()){

		if (m-aaa[i] < 0) continue;

		ll lower = upper_bound(bbb.begin(), bbb.end(), m-aaa[i]) - bbb.begin();

		ans += lower;
	}
	cout << ans;

}

Compilation message (stderr)

bobek.cpp: In function 'int main()':
bobek.cpp:7:35: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    7 | #define FOR(i, x, y) for(ll i=x; i<y; i++)
......
   54 |  FOR(i,0,aaa.size()){
      |      ~~~~~~~~~~~~~~                
bobek.cpp:54:2: note: in expansion of macro 'FOR'
   54 |  FOR(i,0,aaa.size()){
      |  ^~~

• 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