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답안 #469505

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
469505 2021-09-01T08:16:59 Z radal Party (INOI20_party) C++14
7 / 100
 665 ms 1212 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,ll 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];
map<pair<ll,int>,ll> cnt1,cn1;
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,1,261)
        pw[i] = 2*pw[i-1]%mod;
    while (q--){
        cin >> n;
        if (__builtin_popcountll(n+1) == 1){
            cnt1.clear();
            cn1.clear();
            ll z = 0;
            for (ll i = (n+1)/2; i >= 1; i/=2){
                z++;
                cnt1[{i,0}] = 1;
                rep(j,1,z){
                    if (z > 1)
                        cnt1[{i,j}] = cnt1[{2*i,j-1}]*2;
                }
            }
            for (ll i = 2; i < n; i <<= 1){
                cn1[{i,1}] = 1;
                rep(j,2,123)
                    cn1[{i,j}] = cn1[{i/2,j-1}]+cnt1[{i,j-2}];
            }
            ll ans = 0,y = poww(2,n)-1;
            y = poww(y,mod-2);
            z = 1;
            for (ll i = 1; i < n; i *= 2){
                ll sm = 1;
                rep(j,1,123){
                    ll x = cnt1[{i,j}];
                    ll y = cn1[{i,j}];
                    sm += x+y;
                    ans = mkay(ans,j*(poww(2,x+y)-1)%mod*poww(2,n-sm)%mod*z%mod);
                }
                z *= 2;
            }
            cout << ans*y%mod << endl;
            continue;
        }
        memset(cn,0,sizeof cn);
        memset(cnt,0,sizeof cnt);
        dfs(1);
        dfs2(1);
        ll ans = 0,y = (pw[n]-1);
        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 << ans << endl;
        cout << 1ll*ans*y%mod << endl;
    }
}

Subtask #1
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 716 KB Output is correct
2 Correct 6 ms 716 KB Output is correct
3 Correct 6 ms 716 KB Output is correct
4 Correct 7 ms 716 KB Output is correct
5 Correct 4 ms 588 KB Output is correct
6 Correct 4 ms 588 KB Output is correct
7 Correct 4 ms 716 KB Output is correct
8 Correct 4 ms 588 KB Output is correct
9 Correct 34 ms 400 KB Output is correct
10 Correct 37 ms 332 KB Output is correct
11 Correct 665 ms 432 KB Output is correct
12 Correct 659 ms 540 KB Output is correct
13 Correct 71 ms 716 KB Output is correct
14 Correct 74 ms 640 KB Output is correct
15 Correct 65 ms 640 KB Output is correct
16 Correct 67 ms 636 KB Output is correct
17 Correct 56 ms 588 KB Output is correct
18 Correct 56 ms 640 KB Output is correct
19 Correct 57 ms 640 KB Output is correct
20 Correct 62 ms 588 KB Output is correct

Subtask #2
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 591 ms 1212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 33.0

# 결과 실행 시간 메모리 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

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 716 KB Output is correct
2 Correct 6 ms 716 KB Output is correct
3 Correct 6 ms 716 KB Output is correct
4 Correct 7 ms 716 KB Output is correct
5 Correct 4 ms 588 KB Output is correct
6 Correct 4 ms 588 KB Output is correct
7 Correct 4 ms 716 KB Output is correct
8 Correct 4 ms 588 KB Output is correct
9 Correct 34 ms 400 KB Output is correct
10 Correct 37 ms 332 KB Output is correct
11 Correct 665 ms 432 KB Output is correct
12 Correct 659 ms 540 KB Output is correct
13 Correct 71 ms 716 KB Output is correct
14 Correct 74 ms 640 KB Output is correct
15 Correct 65 ms 640 KB Output is correct
16 Correct 67 ms 636 KB Output is correct
17 Correct 56 ms 588 KB Output is correct
18 Correct 56 ms 640 KB Output is correct
19 Correct 57 ms 640 KB Output is correct
20 Correct 62 ms 588 KB Output is correct
21 Incorrect 591 ms 1212 KB Output isn't correct
22 Halted 0 ms 0 KB -