Submission #170988

#	Time	Username	Problem	Language	Result	Execution time	Memory
170988		bloopie	Ice Hockey World Championship (CEOI15_bobek)	C++14	Compilation error	0 ms	0 KiB

bobek

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int MAXN = 50;
unordered_map<int,ll> memo[MAXN];
int n;
ll mm;
int a[MAXN];

int solve(int i,ll m)
{
if(m > mm)
     return 0;
if(i == n)
      return 1;
if(memo[i].find(m) != memo[i].end())
      return memo[i][m];

int &ret = memo[i][m];
ret = 0;
ret = solve(i + 1 , m + a[i]) + solve(i + 1 , m);

return ret;

}

int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cin >> n >> mm;
    for(int i = 0 ; i < n ; i++)
        cin >> a[i];

   cout << solve(0,0);
}

Compilation message (stderr)

bobek.cpp: In function 'int solve(int, ll)':
bobek.cpp:19:21: error: cannot bind non-const lvalue reference of type 'int&' to an rvalue of type 'int'
 int &ret = memo[i][m];
                     ^