Codeforces 896C Willem, Chtholly and Seniorious 珂朵莉樹
阿新 • • 發佈:2018-12-16
文章目錄
下午寫了一個小時發現快速冪寫萎了.f__k!!! 終於把一個坑給填了.珂學真是太棒了.題意
解法
區間推平操作+資料隨機.用珂朵莉樹維護,均攤的時間複雜度是. 謝謝大家.
#include<bits/stdc++.h> //Ithea Myse Valgulious
namespace chtholly{
typedef long long ll;
#define re0 register int
#define rel register ll
#define rec register char
#define gc getchar
//#define gc() (p1==p2&&(p2=(p1=buf)+fread(buf,1,1<<23,stdin),p1==p2)?-1:*p1++)
#define pc putchar
#define p32 pc(' ')
#define pl puts("")
/*By Citrus*/
char buf[1<<23],*p1=buf,*p2=buf;
inline int read(){
int x=0,f=1;char c=gc();
for (;!isdigit(c);c=gc()) f^=c=='-';
for (;isdigit(c);c=gc()) x=(x<<3)+(x<<1)+(c^'0');
return f?x:-x;
}
template <typename mitsuha>
inline bool read(mitsuha &x){
x=0;int f=1;char c=gc();
for (;!isdigit(c)&&~c;c=gc()) f^=c=='-';
if (!~c) return 0;
for (;isdigit(c);c=gc()) x=(x<<3)+(x<<1)+(c^'0');
return x=f?x:-x,1;
}
template <typename mitsuha>
inline int write(mitsuha x){
if (!x) return 0&pc(48);
if (x<0) pc('-'),x=-x;
int bit[20],i,p=0;
for (;x;x/=10) bit[++p]=x%10;
for (i=p;i;--i) pc(bit[i]+48);
return 0;
}
inline char fuhao(){
char c=gc();
for (;isspace(c);c=gc());
return c;
}
}using namespace chtholly;
using namespace std;
int n,q,vmax,seed;
int rnd() {
int ret=seed;
seed=(seed*7ll+13)%1000000007;
return ret;
}
ll kasumi(ll a,ll b,ll mod){
ll s=1;
for (a%=mod;b;b>>=1,a=a*a%mod) if (b&1) s=s*a%mod;
return s;
}/*快速冪寫萎了......a一定要先模mod!*/
struct chtholly_tree{
struct node{
int l,r; mutable ll v;
node(int nl,int nr=-1,ll val=0):l(nl),r(nr),v(val) {}
bool operator <(const node &b) const{
return l<b.l;
}
};
typedef set<node>::iterator it;
set<node> s;
it split(int pos) {
it p=s.lower_bound(pos);
if (p!=s.end()&&p->l==pos) return p; --p;
int l=p->l,r=p->r; ll v=p->v;
s.erase(p);
s.insert(node(l,pos-1,v));
return s.insert(node(pos,r,v)).first;
}
void assign(int l,int r,int v) {
it itr=split(r+1),itl=split(l);
s.erase(itl,itr);
s.insert(node(l,r,v));
}
void add(int l,int r,int v){
it p,itr=split(r+1),itl=split(l);
for (p=itl;p!=itr;++p) p->v+=v;
}
ll kth(int l,int r,int k,int i=0) {
it p,itr=split(r+1),itl=split(l);
vector<node> llx;
for (p=itl;p!=itr;++p) llx.push_back(*p);
sort(llx.begin(),llx.end(),[](node a,node b){return a.v<b.v;});
/*所以我過載cmp為什麼不給過啊!一定要我用lambda表示式!*/
for (i=0;i<llx.size()&&k>0;++i)
k-=llx[i].r-llx[i].l+1;
return llx[i-1].v;
}
ll query(int l,int r,int x,int y){
it p,itr=split(r+1),itl=split(l);
ll zxy=0;
for (p=itl;p!=itr;++p)
zxy=(zxy+1ll*(p->r-p->l+1)*kasumi(p->v,x,y))%y;
return zxy;
}
void init(int n) {
for (int i=1;i<=n;++i)
s.insert(node(i,i,rnd()%vmax+1));
}
}my_;
int main() {
read(n),read(q);
read(seed),read(vmax);
my_.init(n);
int cnt=0;
for (;q--;) {
int op=rnd()%4+1,l,r,x,y;
l=rnd()%n+1,r=rnd()%n+1;
if (l>r) swap(l,r);
switch(op) {
case 3:
x=rnd()%(r-l+1)+1;
write(my_.kth(l,r,x)),pl;
break;
case 4:
x=rnd()%vmax+1;
y=rnd()%vmax+1;
write(my_.query(l,r,x,y)),pl;
break;
case 1:
x=rnd()%vmax+1;
my_.add(l,r,x);
break;
case 2:
x=rnd()%vmax+1;
my_.assign(l,r,x);
break;
}
}
}