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QOJ
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 |
---|---|---|---|---|---|---|---|---|---|
#153233 | #6562. First Last | qzez# | WA | 2ms | 3620kb | C++14 | 3.5kb | 2023-08-29 18:35:35 | 2023-08-29 18:35:36 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
using ll=long long;
template<typename T>
ostream& operator << (ostream &out,const vector<T>&x){
if(x.empty())return out<<"[]";
out<<'['<<x[0];
for(int len=x.size(),i=1;i<len;i++)out<<','<<x[i];
return out<<']';
}
template<typename T>
vector<T> ary(const T *a,int l,int r){
return vector<T>{a+l,a+1+r};
}
template<typename T>
void debug(T x){
cerr<<x<<'\n';
}
template<typename T,typename ...S>
void debug(T x,S ...y){
cerr<<x<<' ',debug(y...);
}
map<vector<int>,int>s;
void sub(int &x,int &y){
int t=min(x,y);
x-=t,y-=t;
}
int dfs(int aa,int bb,int cc,int ac,int bc,int ab,int ba,int cb,int ca,int x=0){
aa%=2,bb%=2,cc%=2;
sub(ac,ca),sub(ab,ba),sub(bc,cb);
if(x==1){
swap(aa,bb),swap(ac,bc),swap(ab,ba),swap(cb,ca);
}else if(x==2){
swap(aa,cc),swap(ac,ca),swap(bc,ba),swap(cb,ab);
}
vector<int> hsh{aa,bb,cc,ac,bc,ab,ba,cb,ca};
if(s.count(hsh))return s[hsh];
if(aa&&!dfs(aa-1,bb,cc,ac,bc,ab,ba,cb,ca))return s[hsh]=1;
if(ab&&!dfs(aa,bb,cc,ac,bc,ab-1,ba,cb,ca,1))return s[hsh]=1;
if(ac&&!dfs(aa,bb,cc,ac-1,bc,ab,ba,cb,ca,2))return s[hsh]=1;
return s[hsh]=0;
}
int main(){
int n=3;
// for(int aa=0;aa<=n;aa++){
// for(int bb=0;bb<=n;bb++){
// for(int cc=0;cc<=n;cc++){
// for(int ac=0;ac<=n;ac++){
// for(int bc=0;bc<=n;bc++){
// for(int ab=0;ab<=n;ab++){
// for(int ba=0;ba<=n;ba++){
// for(int cb=0;cb<=n;cb++){
// for(int ca=0;ca<=n;ca++){
// // if(!)
// // debug(aa,bb,cc,ac,bc,ab,ba,cb,ca,"ans=",dfs(aa,bb,cc,ac,bc,ab,ba,cb,ca));
// assert(
// dfs(aa,bb,cc,ac,bc,ab,ba,cb,ca)
// ==
// dfs(aa%2,bb%2,cc%2,
// ac-min(ac,ca),bc-min(bc,cb),ab-min(ab,ba),
// ba-min(ab,ba),cb-min(bc,cb),ca-min(ac,ca))
// );
// assert(
// dfs(aa,bb,cc,ac,bc,ab,ba,cb,ca)
// ==
// dfs(aa,bb,cc,ac,bc,ab,ba,cb,ca)
// );
// }
// }
// }
// }
// }
// }
// }
// }
// }
int aa=0,bb=0,cc=0,ab=0,ba=0,ac=0,ca=0,bc=0,cb=0;
// for(int aa=0;aa<=1;aa++){
// for(int bb=0;bb<=1;bb++){
// for(int cc=0;cc<=1;cc++){
// for(int bc=1;bc<=n;bc++){
// for(int ab=1;ab<=n;ab++){
// for(int ca=1;ca<=n;ca++){
// // if(!)
// debug(aa,bb,cc,ab,bc,ca,"ans",dfs(aa,bb,cc,ac,bc,ab,ba,cb,ca));
// // assert(
// // dfs(aa,bb,cc,ac,bc,ab,ba,cb,ca)
// // ==
// // dfs(aa,bb,cc,ac,bc,ab,ba,cb,ca)
// // );
// }
// }
// }
// }
// }
// }
cin>>n;
for(string s;n--;){
cin>>s;
if(s[0]=='a'){
if(s.back()=='a')aa++;
else if(s.back()=='b')ab++;
else ac++;
}else if(s[0]=='b'){
if(s.back()=='a')ba++;
else if(s.back()=='b')bb++;
else bc++;
}else{
if(s.back()=='a')ca++;
else if(s.back()=='b')cb++;
else cc++;
}
}
int ans=0;
if(aa)ans+=!dfs(aa-1,bb,cc,ac,bc,ab,ba,cb,ca)*aa;
if(bb)ans+=!dfs(aa,bb-1,cc,ac,bc,ab,ba,cb,ca,1)*bb;
if(cc)ans+=!dfs(aa,bb,cc-1,ac,bc,ab,ba,cb,ca,2)*cc;
if(ab)ans+=!dfs(aa,bb,cc,ac,bc,ab-1,ba,cb,ca,1)*ab;
if(ba)ans+=!dfs(aa,bb,cc,ac,bc,ab,ba-1,cb,ca)*ba;
if(ac)ans+=!dfs(aa,bb,cc,ac-1,bc,ab,ba,cb,ca,2)*ac;
if(ca)ans+=!dfs(aa,bb,cc,ac,bc,ab,ba,cb,ca-1)*ca;
if(bc)ans+=!dfs(aa,bb,cc,ac,bc-1,ab,ba,cb,ca,2)*bc;
if(cb)ans+=!dfs(aa,bb,cc,ac,bc,ab,ba,cb-1,ca,1)*cb;
cout<<ans<<endl;
return 0;
}
詳細信息
Test #1:
score: 100
Accepted
time: 0ms
memory: 3620kb
input:
3 attic climb alpha
output:
2
result:
ok single line: '2'
Test #2:
score: 0
Accepted
time: 2ms
memory: 3556kb
input:
22 agora alpha antic aorta apnea arena aroma attic basic blurb china circa civic climb cobra cocoa comic comma conic crumb cubic cynic
output:
6
result:
ok single line: '6'
Test #3:
score: 0
Accepted
time: 2ms
memory: 3616kb
input:
3 ccabaabbba acbbbacccb ccccccacba
output:
1
result:
ok single line: '1'
Test #4:
score: -100
Wrong Answer
time: 2ms
memory: 3616kb
input:
11 mraa myga vtwm mala vvgm atvv vusm mznv avea atfv amgv
output:
4
result:
wrong answer 1st lines differ - expected: '7', found: '4'