oj.uz

Submission #469491

# Submission time Handle Problem Language Result Execution time Memory
469491 2021-09-01T07:32:45 Z radal Party (INOI20_party) C++14
7 / 100
 68 ms 1100 KB 
#include <bits/stdc++.h>
#pragma GCC target ("avx,avx2,fma")
#pragma GCC optimize ("O2")
#pragma GCC optimize ("unroll-loops")
#define X first
#define Y second
#define debug(x) cerr << #x << ": " << x << endl;
#define endl '\n'
#define pb push_back
#define rep(i,l,r) for (int i=l; i<r; i++)
#define repr(i,r,l) for (int i=r; i>=l; i--)
using namespace std;
typedef long long ll;
typedef pair<int,int> pll;
const long long int N = 1e3+20,mod = 1e9+7,inf=1e9+1;
ll poww(int n,int k){
    if (!k) return 1;
    if (k == 1) return n;
    ll r = poww(n,k/2);
    return (r*r%mod)*poww(n,(k&1))%mod;
}
ll cnt[N][20],n,cn[N][20],pw[N];
void dfs(int v){
    cnt[v][0] = 1;
    if (2*v <= n){
        dfs(2*v);
        rep(i,1,20) cnt[v][i] = cnt[2*v][i-1];
    }
    if (2*v+1 <= n){
        dfs(2*v+1);
        rep(i,1,20) cnt[v][i] += cnt[2*v+1][i-1];
    }
}
void dfs2(int v){
    if (2*v <= n){
        cn[2*v][1] = 1;
        rep(i,2,20) cn[2*v][i] = cn[v][i-1]+cnt[v][i-1]-cnt[2*v][i-2];
        dfs2(2*v);
    }
    if (2*v+1 <= n){
        cn[2*v+1][1] = 1;
        rep(i,2,20) cn[2*v+1][i] = cn[v][i-1]+cnt[v][i-1]-cnt[2*v+1][i-2];
        dfs2(2*v+1);
    }
}
inline int mkay(int a,int b){
    if (a+b < mod) return a+b;
    return a+b-mod;
}
int main(){
    ios :: sync_with_stdio(0); cin.tie(0); cout.tie(0);
    int q;
    cin >> q;
    pw[0] = 1;
    rep(i,1,201)
        pw[i] = 2*pw[i-1]%mod;
    while (q--){
        memset(cnt,0,sizeof cnt);
        memset(cn,0,sizeof cn);
        cin >> n;
        dfs(1);
        dfs2(1);
        ll ans = 0,y = (pw[n]-1)%mod;
        y = poww(y,mod-2);
        rep(i,1,n+1){
            int sm = 0;
            rep(j,0,20){
                sm += cnt[i][j]+cn[i][j];
                ans = mkay(ans,(1ll*j*(pw[cnt[i][j]+cn[i][j]]-1)%mod)*pw[n-sm]%mod);
            }
        }
        cout << 1ll*ans*y%mod << endl;
    }
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 588 KB Output is correct
2 Correct 4 ms 588 KB Output is correct
3 Correct 4 ms 588 KB Output is correct
4 Correct 4 ms 588 KB Output is correct
5 Correct 4 ms 640 KB Output is correct
6 Correct 4 ms 576 KB Output is correct
7 Correct 4 ms 588 KB Output is correct
8 Correct 4 ms 644 KB Output is correct
9 Correct 4 ms 588 KB Output is correct
10 Correct 4 ms 576 KB Output is correct
11 Correct 65 ms 588 KB Output is correct
12 Correct 67 ms 648 KB Output is correct
13 Correct 65 ms 648 KB Output is correct
14 Correct 68 ms 768 KB Output is correct
15 Correct 66 ms 588 KB Output is correct
16 Correct 67 ms 644 KB Output is correct
17 Correct 55 ms 648 KB Output is correct
18 Correct 55 ms 640 KB Output is correct
19 Correct 55 ms 644 KB Output is correct
20 Correct 57 ms 720 KB Output is correct

Subtask #2
0 / 23.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 1100 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #3
0 / 33.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 1100 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #4
0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 588 KB Output is correct
2 Correct 4 ms 588 KB Output is correct
3 Correct 4 ms 588 KB Output is correct
4 Correct 4 ms 588 KB Output is correct
5 Correct 4 ms 640 KB Output is correct
6 Correct 4 ms 576 KB Output is correct
7 Correct 4 ms 588 KB Output is correct
8 Correct 4 ms 644 KB Output is correct
9 Correct 4 ms 588 KB Output is correct
10 Correct 4 ms 576 KB Output is correct
11 Correct 65 ms 588 KB Output is correct
12 Correct 67 ms 648 KB Output is correct
13 Correct 65 ms 648 KB Output is correct
14 Correct 68 ms 768 KB Output is correct
15 Correct 66 ms 588 KB Output is correct
16 Correct 67 ms 644 KB Output is correct
17 Correct 55 ms 648 KB Output is correct
18 Correct 55 ms 640 KB Output is correct
19 Correct 55 ms 644 KB Output is correct
20 Correct 57 ms 720 KB Output is correct
21 Runtime error 1 ms 1100 KB Execution killed with signal 11
22 Halted 0 ms 0 KB -