Submission #94375

#	Time	Username	Problem	Language	Result	Execution time	Memory
94375		fjzzq2002	Game (IOI13_game)	C++14	100 / 100	7109 ms	51516 KiB

game

#include "game.h"
#include <bits/stdc++.h>
using namespace std;
typedef unsigned long long ull;
typedef long long ll;
inline ull gcd(ull a,ull b)
{
	if(a==0||b==0) return a^b;
    #define ctz __builtin_ctzll
    int shift = ctz(a | b);
    b >>= ctz(b);
    while (a) {
        a >>= ctz(a);
        if (a < b) swap(a, b);
        a -= b;
    }
    return b << shift;
    #undef ctz
}
 
#define SS 2600003
int an=0,ch[SS][2],sz[SS],RR;
ull vv[SS],ss[SS];
ll xx[SS],L[SS],R[SS];
void upd(int x)
{
	sz[x]=1+sz[ch[x][0]]+sz[ch[x][1]];
	ss[x]=gcd(gcd(vv[x],ss[ch[x][0]]),ss[ch[x][1]]);
	L[x]=ch[x][0]?L[ch[x][0]]:xx[x];
	R[x]=ch[x][1]?R[ch[x][1]]:xx[x];
}
#define rnd rand
int merge(int a,int b)
{
	if(a&&b);else return a^b;
	if(rnd()%(sz[a]+sz[b])<sz[a])
	{
		ch[a][1]=merge(ch[a][1],b),upd(a);
		return a;
	}
	else
	{
		ch[b][0]=merge(a,ch[b][0]),upd(b);
		return b;
	}
}
void split(int x,ll u,int& a,int& b)
{
	if(x==0) {a=b=0; return;}
	if(xx[x]<=u)
		a=x, split(ch[a][1],u,ch[a][1],b), upd(a);
	else
		b=x, split(ch[b][0],u,a,ch[b][0]), upd(b);
}
const ll P=1.01e9;
void edt(int& u,int x,int y,ull v)
{
	int A,B,C;
	split(u,x*P+y-1,A,B);
	split(B,x*P+y,B,C);
	if(!B) B=++an,sz[B]=1,xx[B]=L[B]=R[B]=x*P+y;
	else assert(sz[B]==1);
	vv[B]=ss[B]=v;
	B=merge(B,C);
	u=merge(A,B);
}
inline ull calc(int u,ll l,ll r)
{
	if(!u||R[u]<l||r<L[u]) return 0;
	if(l<=L[u]&&R[u]<=r) return ss[u];
	ull t=0;
	if(l<=xx[u]&&xx[u]<=r) t=vv[u];
	t=gcd(t,calc(ch[u][0],l,r));
	if(t==1) return 1;
	return gcd(t,calc(ch[u][1],l,r));
}
inline ull qry(int& u,int l,int r)
{return calc(u,l*P,r*P+P-1);}
int seg_ch[SS][2],seg_ps[SS],sn=0,ro;
void edt(int& x,int l,int r,int p,int q,ull v)
{
	if(!x) x=++sn; edt(seg_ps[x],q,p,v);
	if(l==r) return;
	int m=(l+r)>>1;
	if(p<=m) edt(seg_ch[x][0],l,m,p,q,v);
	else edt(seg_ch[x][1],m+1,r,p,q,v);
}
ull qry(int x,int l,int r,int pl,int pr,int sl,int sr)
{
	if(r<pl||pr<l||!x||pl>pr) return 0;
	if(pl<=l&&r<=pr) return qry(seg_ps[x],sl,sr);
	int m=(l+r)>>1;
	return gcd(qry(seg_ch[x][0],l,m,pl,pr,sl,sr),
	qry(seg_ch[x][1],m+1,r,pl,pr,sl,sr));
}
 
void init(int R_, int C_) {
	RR=R_;
}
 
void update(int P, int Q, long long K) {
	edt(ro,0,RR-1,P,Q,K);
}
 
long long calculate(int P, int Q, int U, int V) {
	return qry(ro,0,RR-1,P,U,Q,V);
}

Compilation message (stderr)

grader.c: In function 'int main()':
grader.c:18:6: warning: variable 'res' set but not used [-Wunused-but-set-variable]
  int res;
      ^~~
game.cpp: In function 'void edt(int&, int, int, int, int, ull)':
game.cpp:82:2: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
  if(!x) x=++sn; edt(seg_ps[x],q,p,v);
  ^~
game.cpp:82:17: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
  if(!x) x=++sn; edt(seg_ps[x],q,p,v);
                 ^~~

• Subtask 1: 10 / 10
• Subtask 2: 27 / 27
• Subtask 3: 26 / 26
• Subtask 4: 17 / 17
• Subtask 5: 20 / 20