Submission #464108

#	Time	Username	Problem	Language	Result	Execution time	Memory
464108		Sench2006	Rack (eJOI19_rack)	C++14	Compilation error	0 ms	0 KiB

rack

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

#define ll long long
#define ar array

#define f first
#define s second
#define mpr make_pair
#define pb push_back
#define lb lower_bound
#define ub upper_bound
#define all(x) x.begin(), x.end()

#define FOR(i, a, b) for(auto i = a; i < b; i++)
#define FORD(i, a, b) for(auto i = a - 1; i >= b; i--)
#define trav(x, v) for(auto x : v)

#define fastio ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
#define fileio freopen("input.txt", "r", stdin); freopen("output.txt", "w", stdout);

// --------------- SOLUTION --------------- //

const int MOD = 1e9+7;
int n, k;

int getAns(int n, int k) {
  if (n == 0) return 1;
  if (k % 2 == 1) return getAns(n - 1, (k + 1) / 2);
  if (k % 2 == 0) return (getAns(n - 1, k / 2) + (x[n - 1]) % MOD));
}

void solve() {
    cin >> n >> k;
  	x[0] = 1;
  	FOR(i, 1, n + 1) {
      x[i] = (x[i - 1] * 2) % MOD;
    }
  	cout << getAns(n, k) << "\n";
}

int main() {
    fastio;
    //fileio;
    int tests = 1;
    // cin >> tests;
    while (tests--) {
        solve();
    }

    return 0;
}

Compilation message (stderr)

rack.cpp: In function 'int getAns(int, int)':
rack.cpp:30:51: error: 'x' was not declared in this scope
   30 |   if (k % 2 == 0) return (getAns(n - 1, k / 2) + (x[n - 1]) % MOD));
      |                                                   ^
rack.cpp:30:67: error: expected ';' before ')' token
   30 |   if (k % 2 == 0) return (getAns(n - 1, k / 2) + (x[n - 1]) % MOD));
      |                                                                   ^
      |                                                                   ;
rack.cpp:30:3: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   30 |   if (k % 2 == 0) return (getAns(n - 1, k / 2) + (x[n - 1]) % MOD));
      |   ^~
rack.cpp:30:67: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   30 |   if (k % 2 == 0) return (getAns(n - 1, k / 2) + (x[n - 1]) % MOD));
      |                                                                   ^
rack.cpp:30:67: error: expected primary-expression before ')' token
rack.cpp: In function 'void solve()':
rack.cpp:35:4: error: 'x' was not declared in this scope
   35 |    x[0] = 1;
      |    ^