Submission #259464

#	Time	Username	Problem	Language	Result	Execution time	Memory
259464		MatheusLealV	Ice Hockey World Championship (CEOI15_bobek)	C++17	100 / 100	721 ms	25148 KiB

bobek

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

#define ll long long int 
 
vector<ll> masks[2]; //eu vou ordenar o segundo bloco, e pra cada cara no 1o eu faço uma BB no 2o
ll resp = 0, m, arr[40];
int n, maxmask;

int mask_roll(int l, int r, bool div){

	//calcular a mascara base
	maxmask = (1LL << (r - l + 1));

	for(int i = 0; i < maxmask; i++){

		ll soma = 0, roll = i;

		for(int j = l; j <= r; j++){

			if(roll%2) soma += arr[j];
			roll >>= 1;
		}

		masks[div].push_back(soma);
	}
}

ll bb(ll num){

	//return +1
	ll val = - 1;

	int ini = 0, fim = maxmask-1;

	while(ini <= fim){

		int mid = (ini+fim)/2;

		if(masks[1][mid] + num <= m){
			val = mid;
			ini = mid+1;
		}
		else 
			fim = mid-1;
	}

	return val+1;	
}

int main(){

	cin >> n >> m;

	for(int i = 0; i < n; i++)
		cin >> arr[i];

	int mid = n/2;

	mask_roll(0, mid, 0);
	mask_roll(mid+1, n-1, 1);

	sort(masks[1].begin(), masks[1].end());

	for(int i = 0; i < (int)masks[0].size(); i++){
		resp += bb(masks[0][i]);
	}

	cout << resp << endl;

	return 0;
}

Compilation message (stderr)

bobek.cpp: In function 'int mask_roll(int, int, bool)':
bobek.cpp:27:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^

• 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