【BZOJ4722】由乃
【BZOJ4722】由乃
题面
题解
考虑到区间长度为\(14\)时子集个数\(2^{14}>14\times 1000\),由抽屉原理,区间长度最多为\(13\)(长度大于这个值就一定有解)。
那么对于一个区间我们可以暴力背包\(dp\)出来,然后\(bitset\)优化下就是\(\frac {13\times 1000}{64}\)的,如果转移时转移的状态与目前状态有交显然就有解。
对于区间立方用树状数组记一下每个数立方了多少次,立方后的数倍增预处理即可。
代码
#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <algorithm>
#include <bitset>
using namespace std;
inline int gi() {
register int data = 0, w = 1;
register char ch = 0;
while (!isdigit(ch) && ch != '-') ch = getchar();
if (ch == '-') w = -1, ch = getchar();
while (isdigit(ch)) data = 10 * data + ch - '0', ch = getchar();
return w * data;
}
const int MAX_N = 1e5 + 5;
int N, Q, Mod, a[MAX_N], c[MAX_N];
inline int lb(int x) { return x & -x; }
void Add(int x, int v) { while (x <= N) c[x] += v, x += lb(x); }
int Sum(int x) { int res = 0; while (x) res += c[x], x -= lb(x); return res; }
bitset<13001> f;
int nxt[18][MAX_N];
int Trans(int x, int y) {
for (int i = 17; ~i; i--)
if (y >> i & 1) x = nxt[i][x];
return x;
}
int main () {
#ifndef ONLINE_JUDGE
freopen("cpp.in", "r", stdin);
#endif
N = gi(), Q = gi(), Mod = gi();
for (int i = 1; i <= N; i++) a[i] = gi();
for (int i = 0; i < Mod; i++) nxt[0][i] = i * i * i % Mod;
for (int i = 1; i < 18; i++)
for (int j = 0; j < Mod; j++) nxt[i][j] = nxt[i - 1][nxt[i - 1][j]];
while (Q--) {
int op = gi(), l = gi(), r = gi();
if (op == 1) {
if (r - l + 1 >= 14) puts("Yuno");
else {
f.reset();
f[0] = 1;
for (int i = l; i <= r; i++) {
int val = Trans(a[i], Sum(i)) + 1;
if ((f & (f << val)).any()) { puts("Yuno"); goto Nxt; }
f |= f << val;
}
puts("Yuki");
Nxt : ;
}
} else Add(l, 1), Add(r + 1, -1);
}
return 0;
}