Submission #658787

#	Time	Username	Problem	Language	Result	Execution time	Memory
658787		beaconmc	Ice Hockey World Championship (CEOI15_bobek)	C++14	100 / 100	323 ms	20772 KiB

bobek

#pragma GCC optimize(" unroll-loops")
#pragma gcc optimize("Ofast")
#pragma GCC optimization("Ofast")
#pragma optimize(Ofast)
#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--)
#define fast() ios_base::sync_with_stdio(false);cin.tie(NULL)

ll sus[41];

int main(){
	ll a,b,n,m;
	//map<ll, ll> aa, bb;
	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);
	}





	// ll cur = 0;

	// for (auto&i : aa){
	// 	aaa.push_back(i.first);
	// 	aaa2.push_back(i.second);

	// }
	// cur = 0;

	// for (auto&i : bb){
	// 	cur += i.second;
	// 	bbb.push_back(i.first);
	// 	bbb2.push_back(cur);
	// }
	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:2: warning: ignoring '#pragma gcc optimize' [-Wunknown-pragmas]
    2 | #pragma gcc optimize("Ofast")
      | 
bobek.cpp:3: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    3 | #pragma GCC optimization("Ofast")
      | 
bobek.cpp:4: warning: ignoring '#pragma optimize ' [-Wunknown-pragmas]
    4 | #pragma optimize(Ofast)
      | 
bobek.cpp:1:37: warning: bad option '-f unroll-loops' to pragma 'optimize' [-Wpragmas]
    1 | #pragma GCC optimize(" unroll-loops")
      |                                     ^
bobek.cpp:18:10: warning: bad option '-f unroll-loops' to attribute 'optimize' [-Wattributes]
   18 | int main(){
      |          ^
bobek.cpp: In function 'int main()':
bobek.cpp:12:35: 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]
   12 | #define FOR(i, x, y) for(ll i=x; i<y; i++)
......
   80 |  FOR(i,0,aaa.size()){
      |      ~~~~~~~~~~~~~~                
bobek.cpp:80:2: note: in expansion of macro 'FOR'
   80 |  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