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void solve(ll &T)
{
    ll n;
    cin>>n;
 
    queue<ll> q;
    for(ll i=0; i<n; i++)
    {
        ll p;
        cin>>p;
        q.push(p);
    }
 
    map<ll,ll> coin;
    while(!q.empty())
    {
        ll p = q.front();
        q.pop();
 
        if(p == 5) {
            coin[5]++;
        }
        else if(p == 10 and coin[5]) {
            coin[5]--;
            coin[10]++;
        }
        else if(p == 15)
        {
            if(coin[10]) {
                coin[10]--;
                coin[15]++;
            }
            else if(coin[5] >= 2) {
                coin[5] -= 2;
                coin[15]++;
            }
            else {
                cout<<"NO\n";
                return;
            }
        }
        else {
            cout<<"NO\n";
            return;
        }
    }
    cout<<"YES\n";
}

prog.cpp:2:12: error: unknown type name 'll'
void solve(ll &T)
           ^
prog.cpp:4:5: error: unknown type name 'll'
    ll n;
    ^
prog.cpp:5:5: error: use of undeclared identifier 'cin'
    cin>>n;
    ^
prog.cpp:7:5: error: use of undeclared identifier 'queue'
    queue<ll> q;
    ^
prog.cpp:7:11: error: use of undeclared identifier 'll'
    queue<ll> q;
          ^
prog.cpp:7:15: error: use of undeclared identifier 'q'
    queue<ll> q;
              ^
prog.cpp:8:9: error: unknown type name 'll'
    for(ll i=0; i<n; i++)
        ^
prog.cpp:10:9: error: unknown type name 'll'
        ll p;
        ^
prog.cpp:11:9: error: use of undeclared identifier 'cin'
        cin>>p;
        ^
prog.cpp:12:9: error: use of undeclared identifier 'q'
        q.push(p);
        ^
prog.cpp:15:5: error: use of undeclared identifier 'map'
    map<ll,ll> coin;
    ^
prog.cpp:15:9: error: use of undeclared identifier 'll'
    map<ll,ll> coin;
        ^
prog.cpp:15:12: error: use of undeclared identifier 'll'
    map<ll,ll> coin;
           ^
prog.cpp:15:16: error: use of undeclared identifier 'coin'
    map<ll,ll> coin;
               ^
prog.cpp:16:12: error: use of undeclared identifier 'q'
    while(!q.empty())
           ^
prog.cpp:18:9: error: unknown type name 'll'
        ll p = q.front();
        ^
prog.cpp:18:16: error: use of undeclared identifier 'q'
        ll p = q.front();
               ^
prog.cpp:19:9: error: use of undeclared identifier 'q'
        q.pop();
        ^
prog.cpp:22:13: error: use of undeclared identifier 'coin'
            coin[5]++;
            ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.

Standard output is empty