Submission #764659

#TimeUsernameProblemLanguageResultExecution timeMemory
764659Gabi88Rack (eJOI19_rack)C++14
100 / 100
8 ms468 KiB
#include<bits/stdc++.h> using namespace std; #define LL long long const LL mod = 1000000007; LL n, k, br = 0, tmp = 1; int main(){ ios_base::sync_with_stdio(false); cin.tie(0); cin >> n >> k; k--; vector<bool> v={}; while(k > 0){ v.push_back(k%2); k /= 2; } while(v.size() < n) v.push_back(0); reverse(v.begin(), v.end()); for(int i=0; i<n; i++){ if (v[i]){ br += tmp; br %= mod; } tmp *= 2; tmp %= mod; } cout << (br+1) % mod; return 0; }

Compilation message (stderr)

rack.cpp: In function 'int main()':
rack.cpp:13:17: warning: comparison of integer expressions of different signedness: 'std::vector<bool>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   13 |  while(v.size() < n) v.push_back(0);
      |        ~~~~~~~~~^~~
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