oj.uz

Submission #469567

# Submission time Handle Problem Language Result Execution time Memory
469567 2021-09-01T11:04:52 Z FatihSolak Rack (eJOI19_rack) C++17
100 / 100
 6 ms 8140 KB 
#include <bits/stdc++.h>
#define N 1000005
#define int long long
using namespace std;
const int mod = 1e9+7;
int pw[N];
int binpow(int a,int b){
    int ret = 1;
    while(b){
        if(b&1){
            ret = ret*a%mod;
        }
        a = a*a%mod;
        b >>= 1;
    }
    return ret;
}
void solve(){
    int n,k;
    cin >> n >> k;
    int ans = 1;
    for(int i=60;i>=0;i--){
        if(k > pw[i]){
            k -= pw[i];
            ans = (ans + binpow(2,n-i-1))%mod;
        }
    }
    cout << ans;
}

int32_t main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    #ifdef Local
    freopen("in.txt","r",stdin);
    freopen("out.txt","w",stdout);
    #endif
    pw[0] = 1;
    for(int i=1;i<N;i++){
        pw[i] = min((int)2e18,pw[i-1]*2);
    }
    int t=1;
    //cin>>t;
    while(t--){
        solve();
    }
    #ifdef Local
    cout<<endl<<fixed<<setprecision(2)<<1000.0 * clock() / CLOCKS_PER_SEC<< " milliseconds ";
    #endif
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 8140 KB Output is correct
2 Correct 5 ms 8060 KB Output is correct
3 Correct 5 ms 8012 KB Output is correct
4 Correct 5 ms 8012 KB Output is correct
5 Correct 5 ms 8012 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 8140 KB Output is correct
2 Correct 5 ms 8060 KB Output is correct
3 Correct 5 ms 8012 KB Output is correct
4 Correct 5 ms 8012 KB Output is correct
5 Correct 5 ms 8012 KB Output is correct
6 Correct 5 ms 8140 KB Output is correct
7 Correct 5 ms 8012 KB Output is correct
8 Correct 5 ms 8012 KB Output is correct
9 Correct 5 ms 8012 KB Output is correct
10 Correct 6 ms 8012 KB Output is correct

Subtask #3
60.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 8140 KB Output is correct
2 Correct 5 ms 8060 KB Output is correct
3 Correct 5 ms 8012 KB Output is correct
4 Correct 5 ms 8012 KB Output is correct
5 Correct 5 ms 8012 KB Output is correct
6 Correct 5 ms 8140 KB Output is correct
7 Correct 5 ms 8012 KB Output is correct
8 Correct 5 ms 8012 KB Output is correct
9 Correct 5 ms 8012 KB Output is correct
10 Correct 6 ms 8012 KB Output is correct
11 Correct 5 ms 8012 KB Output is correct
12 Correct 5 ms 8012 KB Output is correct
13 Correct 6 ms 8076 KB Output is correct
14 Correct 5 ms 8012 KB Output is correct
15 Correct 5 ms 8012 KB Output is correct