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답안 #633681

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
633681 2022-08-23T04:03:55 Z 406 Party (INOI20_party) C++17
7 / 100
 3000 ms 548 KB 
#include <bits/stdc++.h>
using ll = long long;
using namespace std;

#define forn(a, b) for (int a = 0; a < (b); a++)
#define rofn(a, b) for (int a = (b) - 1; a >= 0; a--)
#define LOG(a) (63 - __builtin_clzll(a))
#define chmx(a, b) a = max(a, b)
#define chmn(a, b) a = min(a, b)
#define pb push_back
#define gc() (p1==p2&&(p2=(p1=buf)+fread(buf,1,1<<21,stdin),p1==p2)?EOF:*p1++)
char buf[1<<21],*p1,*p2;

inline int read() {
	int x = 0, f = 1; char c;
	while(!isdigit(c = gc())) if(c=='-') f=-1;
	while(isdigit(c)) x = (x<<3)+(x<<1)+(c^48), c = gc();
	return x * f;
}
const ll INFL = 1ll << 60;
const int INF = 1 << 29;
const int N = 62;
const int M = 2 * N;
const int MOD = 1e9 + 7;

ll d[2][M][M], ptr, q, ans, n;

ll pw(ll a, ll b) {
    b %= (MOD - 1);
    a %= MOD;

    ll re = 1;
    while (b) {
        if (b & 1)
            re = (re * a) % MOD;
        a = (a * a) % MOD;
        b /= 2;
    }
    return re;
}

void calc_dist(ll v, ll sub, int lg) {
    for (int k = lg; k < 62; k++) {
        int x = k - lg;
        if ((x + lg) > 62 || (v << x) > n)
            d[1][ptr][x] = 0;
        else
            d[1][ptr][x] = min(n - (v << x) + 1, ((ll)1 << x));
    }
    if (v > 1) {
        for (int k = 2; k < N + 2; k++)
            d[0][ptr][k] -= d[1][ptr][k - 2];
    }
}

void pass() {
    for (int k = 1; k < M; k++)
        d[0][ptr + 1][k] = d[0][ptr][k - 1] + d[1][ptr][k - 1];
    ptr++;
}

void Complete(ll v, ll sub, int lg) {
    if (v > n) {
        ptr--;
        return;
    }
    //cout << "C: " << v << ' ' << sub << " PTR: " << ptr << '\n';
    calc_dist(v, sub, lg);

    pass();
    Complete(v << 1, sub >> 1, lg + 1);
    q <<= 1;
    if (q >= MOD)
        q -= MOD;

    ll s = 0;
    for (int k = 0; k < M; k++) {
        if (!d[0][ptr][k] && !d[1][ptr][k])
            continue;
        s += d[0][ptr][k] + d[1][ptr][k];
        ll t = pw(2, d[0][ptr][k] + d[1][ptr][k]) - 1;

        q += (k * t % MOD) * pw(2, n - s) % MOD;
        if (q >= MOD)
            q -= MOD;
    }
    ptr--;
}

void F(ll v, ll sub, int lg) {
    if (v > n) {
        ptr--;
        return;
    }
    //cout << "F: " << v << ' ' << sub << " PTR: " << ptr << '\n';
    calc_dist(v, sub, lg);

    ll r = (v << 1) | 1;
    ll l = (v << 1);
    int cntr = 0, cntl = 0;
    
    while (r <= n)
        r <<= 1, cntr++;
    while (l <= n)
        l <<= 1, cntl++;

    if (cntr == cntl) {
        q = 0;
        pass();
        Complete(v << 1, (1ll << cntl) - 1, lg + 1);
        ans += q;
        ans %= MOD;

        pass();
        F((v << 1) | 1, sub - (1ll << cntl), lg + 1);
    }
    else {
        q = 0;
        pass();
        Complete((v << 1) | 1, (1ll << cntr) - 1,lg + 1);

        ans += q;
        if (ans >= MOD)
            ans -= MOD;

        pass();
        F((v << 1), sub - (1ll << cntr), lg + 1);
    }
    

    ll s = 0;
    for (int k = 0; k < M; k++) {
        s += d[0][ptr][k] + d[1][ptr][k];
        ll t = pw(2, d[0][ptr][k] + d[1][ptr][k]) - 1;
        ans += k * t % MOD * pw(2, n - s) % MOD;
        if (ans >= MOD)
            ans -= MOD;
    }
    ptr--;
}

signed main() {
    ios::sync_with_stdio(0), cin.tie(0);
    int query;
    cin >> query;
    while (query--) {
        cin >> n;

        F(1, n, 1);
        ll re = pw(2, n) - 1;

        ans = (ans * pw(re, MOD - 2)) % MOD;
        cout << ans << '\n';

        ans = q = ptr = 0;
    }
    return 0;
}

Subtask #1
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 340 KB Output is correct
2 Correct 2 ms 340 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 2 ms 212 KB Output is correct
5 Correct 3 ms 340 KB Output is correct
6 Correct 2 ms 344 KB Output is correct
7 Correct 3 ms 340 KB Output is correct
8 Correct 3 ms 340 KB Output is correct
9 Correct 2 ms 336 KB Output is correct
10 Correct 3 ms 340 KB Output is correct
11 Correct 47 ms 344 KB Output is correct
12 Correct 46 ms 340 KB Output is correct
13 Correct 45 ms 340 KB Output is correct
14 Correct 52 ms 340 KB Output is correct
15 Correct 51 ms 340 KB Output is correct
16 Correct 47 ms 352 KB Output is correct
17 Correct 42 ms 332 KB Output is correct
18 Correct 44 ms 352 KB Output is correct
19 Correct 44 ms 340 KB Output is correct
20 Correct 43 ms 340 KB Output is correct

Subtask #2
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1988 ms 420 KB Output is correct
2 Correct 2271 ms 548 KB Output is correct
3 Correct 2050 ms 420 KB Output is correct
4 Correct 1720 ms 420 KB Output is correct
5 Correct 2091 ms 424 KB Output is correct
6 Correct 2039 ms 408 KB Output is correct
7 Correct 1841 ms 416 KB Output is correct
8 Correct 1939 ms 432 KB Output is correct
9 Correct 1880 ms 424 KB Output is correct
10 Correct 2043 ms 424 KB Output is correct
11 Execution timed out 3084 ms 340 KB Time limit exceeded
12 Halted 0 ms 0 KB -

Subtask #3
0 / 33.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1848 ms 424 KB Output is correct
2 Correct 2079 ms 424 KB Output is correct
3 Correct 1780 ms 420 KB Output is correct
4 Correct 1829 ms 420 KB Output is correct
5 Correct 2101 ms 432 KB Output is correct
6 Correct 2047 ms 472 KB Output is correct
7 Correct 1996 ms 424 KB Output is correct
8 Correct 2124 ms 432 KB Output is correct
9 Correct 1928 ms 540 KB Output is correct
10 Correct 2099 ms 460 KB Output is correct
11 Execution timed out 3089 ms 340 KB Time limit exceeded
12 Halted 0 ms 0 KB -

Subtask #4
0 / 37.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 340 KB Output is correct
2 Correct 2 ms 340 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 2 ms 212 KB Output is correct
5 Correct 3 ms 340 KB Output is correct
6 Correct 2 ms 344 KB Output is correct
7 Correct 3 ms 340 KB Output is correct
8 Correct 3 ms 340 KB Output is correct
9 Correct 2 ms 336 KB Output is correct
10 Correct 3 ms 340 KB Output is correct
11 Correct 47 ms 344 KB Output is correct
12 Correct 46 ms 340 KB Output is correct
13 Correct 45 ms 340 KB Output is correct
14 Correct 52 ms 340 KB Output is correct
15 Correct 51 ms 340 KB Output is correct
16 Correct 47 ms 352 KB Output is correct
17 Correct 42 ms 332 KB Output is correct
18 Correct 44 ms 352 KB Output is correct
19 Correct 44 ms 340 KB Output is correct
20 Correct 43 ms 340 KB Output is correct
21 Correct 1988 ms 420 KB Output is correct
22 Correct 2271 ms 548 KB Output is correct
23 Correct 2050 ms 420 KB Output is correct
24 Correct 1720 ms 420 KB Output is correct
25 Correct 2091 ms 424 KB Output is correct
26 Correct 2039 ms 408 KB Output is correct
27 Correct 1841 ms 416 KB Output is correct
28 Correct 1939 ms 432 KB Output is correct
29 Correct 1880 ms 424 KB Output is correct
30 Correct 2043 ms 424 KB Output is correct
31 Execution timed out 3084 ms 340 KB Time limit exceeded
32 Halted 0 ms 0 KB -