UVa 12166 - Equilibrium Mobile

dfs类的题,感觉应该还能再优化,时间用了0.9s+,挺长的。。

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#include<iostream>
#include<algorithm>
#include<string>
#include<sstream>
#include<vector>
using namespace std;
struct Node{
string s;
unsigned long long t;
Node *left,*right;
Node():t(0),left(NULL),right(NULL){}
};
Node *root;
int cnt1,cnt2,cnt;
vector<unsigned long long>heavy;
Node* newnode(){
return new Node;
}
void build(Node* a,int n){
int i,k=0;
if(a->s.find("[")==string::npos){
stringstream ss(a->s);
ss>>a->t;
cnt1++;
heavy.push_back(a->t<<n);
return;
}
a->left=newnode();
for(i=1;i<a->s.length();i++){
if(a->s[i]=='[') k++;
if(a->s[i]==']') k--;
if(!k&&a->s[i]==',') break;
a->left->s+=a->s[i];
}
a->right=newnode();
for(i++;i<a->s.length()-1;i++)
a->right->s+=a->s[i];
build(a->left,n+1);
build(a->right,n+1);
return;
}
int main(){
int t;
cin>>t;
while(t--){
string s;
cin>>s;
cnt1=0;
cnt2=cnt=1;
root=newnode();
root->s=s;
build(root,0);
sort(heavy.begin(),heavy.end());
for(int i=0;i<heavy.size()-1;i++){
if(heavy[i]==heavy[i+1]) cnt++;
else cnt=1;
cnt2=max(cnt2,cnt);
}
cout<<cnt1-cnt2<<endl;
heavy.clear();
}
return 0;
}

本文迁移自我的 CSDN博客 ,格式可能有所偏差。