Submission #549333

#	Time	Username	Problem	Language	Result	Execution time	Memory
549333		krit3379	Ice Hockey World Championship (CEOI15_bobek)	C++17	100 / 100	497 ms	8636 KiB

bobek

#include<bits/stdc++.h>
using namespace std;
#define N 1005

long long k,c,sum,ans;
vector<long long> a,b,v;

int main(){
    int n,i,j;
    scanf("%d %lld",&n,&k);
    for(i=1;i<=n/2;i++)scanf("%lld",&c),a.push_back(c);
    n-=n/2;
    for(i=1;i<=n;i++)scanf("%lld",&c),b.push_back(c);
    n=a.size();
    for(i=0;i<1<<n;i++){
        sum=0;
        for(j=0;j<n;j++){
            if(i&(1<<j))sum+=a[j];
        }
        v.push_back(sum);
    }
    sort(v.begin(),v.end());
    n=b.size();
    for(i=0;i<1<<n;i++){
        sum=0;
        for(j=0;j<n;j++){
            if(i&(1<<j))sum+=b[j];
        }
        ans+=upper_bound(v.begin(),v.end(),k-sum)-v.begin();
    }
    printf("%lld",ans);
    return 0;
}

Compilation message (stderr)

bobek.cpp: In function 'int main()':
bobek.cpp:10:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |     scanf("%d %lld",&n,&k);
      |     ~~~~~^~~~~~~~~~~~~~~~~
bobek.cpp:11:29: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |     for(i=1;i<=n/2;i++)scanf("%lld",&c),a.push_back(c);
      |                        ~~~~~^~~~~~~~~~~
bobek.cpp:13:27: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |     for(i=1;i<=n;i++)scanf("%lld",&c),b.push_back(c);
      |                      ~~~~~^~~~~~~~~~~

• 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