Submission #766361

#	Time	Username	Problem	Language	Result	Execution time	Memory
766361		a_aguilo	Ice Hockey World Championship (CEOI15_bobek)	C++14	70 / 100	66 ms	7380 KiB

bobek

#include<bits/stdc++.h>

using namespace std;

int N;
long long M;
long long cost[40];

void smallM(){
	vector<long long int> dp(M+1, 0);
	dp[0] = 1;
	for(int match = 0; match < N; ++match){
		for(long long val = M; val > 0; --val){
			if(cost[match] <= val) dp[val] += dp[val - cost[match]];
		}
	}
	long long ans = 0;
	for(int i = 0; i <= M; ++i) ans += dp[i];
	cout << ans << endl;
}

int main(){
	cin >> N >> M;
	for(int i = 0; i < N; ++i) cin >> cost[i];
	if(N <= 20){
		long long ans = 0;
		for(int mask = 0; mask < (1 << N); ++mask){
			long long sum = 0;
			for(int i = 0; i < N; ++i){
				if(mask & (1 << i))sum+= cost[i];
			}
			if(sum <= M) ans++;
		}
		cout << ans << endl;
	}else{
		smallM();
	}
	return 0;
}

• 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: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10