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ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
---|---|---|---|---|---|---|---|---|---|
#288000 | #7863. Parity Game | ucup-team1447# | RE | 1ms | 3820kb | C++14 | 4.3kb | 2023-12-21 14:56:33 | 2023-12-21 14:56:33 |
Judging History
answer
// what is matter? never mind.
//#pragma GCC optimize("Ofast")
//#pragma GCC optimize("unroll-loops")
//#pragma GCC target("sse,sse2,sse3,sse4,popcnt,abm,mmx,avx,avx2")
#include<bits/stdc++.h>
#define For(i,a,b) for(int i=(a);i<=(b);++i)
#define Rep(i,a,b) for(int i=(a);i>=(b);--i)
#define ll long long
#define int long long
#define ull unsigned long long
using namespace std;
inline int read()
{
char c=getchar();int x=0;bool f=0;
for(;!isdigit(c);c=getchar())f^=!(c^45);
for(;isdigit(c);c=getchar())x=(x<<1)+(x<<3)+(c^48);
if(f)x=-x;return x;
}
#define mod 998244353
struct modint{
int x;
modint(int o=0){x=o;}
modint &operator = (int o){return x=o,*this;}
modint &operator +=(modint o){return x=x+o.x>=mod?x+o.x-mod:x+o.x,*this;}
modint &operator -=(modint o){return x=x-o.x<0?x-o.x+mod:x-o.x,*this;}
modint &operator *=(modint o){return x=1ll*x*o.x%mod,*this;}
modint &operator ^=(int b){
modint a=*this,c=1;
for(;b;b>>=1,a*=a)if(b&1)c*=a;
return x=c.x,*this;
}
modint &operator /=(modint o){return *this *=o^=mod-2;}
friend modint operator +(modint a,modint b){return a+=b;}
friend modint operator -(modint a,modint b){return a-=b;}
friend modint operator *(modint a,modint b){return a*=b;}
friend modint operator /(modint a,modint b){return a/=b;}
friend modint operator ^(modint a,int b){return a^=b;}
friend bool operator ==(modint a,int b){return a.x==b;}
friend bool operator !=(modint a,int b){return a.x!=b;}
bool operator ! () {return !x;}
modint operator - () {return x?mod-x:0;}
bool operator <(const modint&b)const{return x<b.x;}
};
inline modint qpow(modint x,int y){return x^y;}
vector<modint> fac,ifac,iv;
inline void initC(int n)
{
if(iv.empty())fac=ifac=iv=vector<modint>(2,1);
int m=iv.size(); ++n;
if(m>=n)return;
iv.resize(n),fac.resize(n),ifac.resize(n);
For(i,m,n-1){
iv[i]=iv[mod%i]*(mod-mod/i);
fac[i]=fac[i-1]*i,ifac[i]=ifac[i-1]*iv[i];
}
}
inline modint C(int n,int m){
if(m<0||n<m)return 0;
return initC(n),fac[n]*ifac[m]*ifac[n-m];
}
inline modint sign(int n){return (n&1)?(mod-1):(1);}
#define fi first
#define se second
#define pb push_back
#define mkp make_pair
typedef pair<int,int>pii;
typedef vector<int>vi;
#define fi first
#define se second
#define pb push_back
#define mkp make_pair
typedef pair<int,int>pii;
typedef vector<int>vi;
#define maxn 1000005
#define inf 0x3f3f3f3f
int n,t;
int op,need,dumb;
vi o;
bool ok[maxn],ok2[maxn];
int win(vi o,int k){
if(k==0){
assert(o.size()%2==1);
int sz=o.size();
For(p,0,sz-2){
vi o2;
For(i,0,p-1) o2.pb(o[i]);
o2.pb(0);
For(i,p+1,(int)o.size()-1) o2.pb(o[i]);
if(win(o2,!k)==-1)return p;
}
return -1;
}else{
assert(o.size()%2==0);
int sz=o.size();
ok[0]=o[0];
for(int i=2;i<sz;i+=2) ok[i]=(ok[i-2]&&o[i]);
ok2[sz-1]=o[sz-1];
for(int i=sz-2;i>=0;i-=2) ok2[i]=(ok2[i+2]&&o[i]);
For(i,0,sz-2){
if(i%2==0){
if(!o[i] && !o[i+1]) continue;
if(i>=2 && !ok[i-2]) continue;
if(i+3<=sz-1 && !ok2[i+3]) continue;
}else{
if(!ok[i-1]) continue;
if(i+1<=sz-1 && !ok2[i+1]) continue;
}
return i;
}
return -1;
}
}
void run(int p){
// for(auto x:o)cout<<x<<" "; cout<<"nows\n";
int x=o[p],y=o[p+1];
if((x+y)%2==need) cout<<p+1<<" "<<"+"<<endl;
else if((x*y)%2==need) cout<<p+1<<" "<<"*"<<endl;
else assert(0);
vi o2;
For(i,0,p-1) o2.pb(o[i]);
o2.pb(need);
For(i,p+2,(int)o.size()-1) o2.pb(o[i]);
o=o2;
}
void run2(){
int p; cin>>p; --p;
char ch; cin>>ch;
int x=o[p],y=o[p+1],z;
if(ch=='+') z=(x+y)%2;
else z=(x*y)%2;
vi o2;
For(i,0,p-1) o2.pb(o[i]);
o2.pb(z);
For(i,p+2,(int)o.size()-1) o2.pb(o[i]);
o=o2;
}
signed main()
{
cin>>n>>t;
o.resize(n);
For(i,0,n-1)cin>>o[i];
if(n%2==1){
// last is bob
if(t==1) op=0,need=0,dumb=1;
else{
if(win(o,0)!=-1) op=1,need=0;
else op=0,need=1;
}
}else{
// last is alice
if(t==0) op=1,need=0,dumb=1;
else{
if(win(o,1)!=-1) op=1,need=1;
else op=0,need=0;
}
}
if(op) cout<<"Alice"<<endl;
else cout<<"Bob"<<endl,run2();
while(o.size()>1){
if(dumb) run(0);
else{
int pos=win(o,need);
assert(pos!=-1);
run(pos);
}
if(o.size()>1) run2();
}
return 0;
}
/*
4
1 3 2 4
3 4 1 2
*/
详细
Test #1:
score: 100
Accepted
time: 0ms
memory: 3628kb
input:
4 1 0 1 0 1 1 * 1
output:
Alice 1 + 1 +
result:
ok The player wins!
Test #2:
score: 0
Accepted
time: 0ms
memory: 3820kb
input:
4 0 1 0 1 0 1 + 1
output:
Alice 1 * 1 *
result:
ok The player wins!
Test #3:
score: 0
Accepted
time: 1ms
memory: 3776kb
input:
5 1 1 1 1 0 0 4 + 1 + 1
output:
Bob 1 + 1 *
result:
ok The player wins!
Test #4:
score: -100
Runtime Error
input:
3 0 1 1 1