Submission #1058740

#	Time	Username	Problem	Language	Result	Execution time	Memory
1058740		Warinchai	Homework (CEOI22_homework)	C++14	100 / 100	79 ms	180428 KiB

Main

#include<bits/stdc++.h>
using namespace std;
int type[1000005];
string s;
struct node{
    int st,en,sz;
    node(int _st=0,int _en=0,int _sz=0){
        st=_st,en=_en,sz=_sz;
    }
    friend node operator+(node a,node b){
        node c;
        c.st=a.st+b.st;
        c.en=max(a.en+b.sz,b.en+a.sz);
        c.sz=a.sz+b.sz;
        return c;
    }
    friend node operator-(node a,node b){
        node c;
        c.st=min(a.st,b.st);
        c.en=a.en+b.en-1;
        c.sz=a.sz+b.sz;
        return c;
    }
}info[10000005];
int cur=0;
int dfs(int u,int st){
    if(s[st]=='?'){
        info[u]=node(1,1,1);
        //cerr<<u<<":leaf\n";
        //cerr<<"vals:"<<info[u].st<<" "<<info[u].en<<" "<<info[u].sz<<"\n";
        return st;
    }else if(s[st+1]=='i'){
        int id1=cur+1;
        int st1=st+4;
        int en1=dfs(++cur,st1);
        int id2=cur+1;
        int st2=en1+2;
        int en2=dfs(++cur,st2);
        info[u]=info[id1]-info[id2];
        //cerr<<u<<":"<<id1<<" "<<id2<<"\n";
        //cerr<<"vals:"<<info[u].st<<" "<<info[u].en<<" "<<info[u].sz<<"\n";
        return en2+1;
    }else{
        int id1=cur+1;
        int st1=st+4;
        int en1=dfs(++cur,st1);
        int id2=cur+1;
        int st2=en1+2;
        int en2=dfs(++cur,st2);
        info[u]=info[id1]+info[id2];
        //cerr<<u<<":"<<id1<<" "<<id2<<"\n";
        //cerr<<"vals:"<<info[u].st<<" "<<info[u].en<<" "<<info[u].sz<<"\n";
        return en2+1;
    }
}
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cin>>s;
    dfs(++cur,0);
    cout<<info[1].en-info[1].st+1;
}

• Subtask 1: 10 / 10
• Subtask 2: 13 / 13
• Subtask 3: 13 / 13
• Subtask 4: 30 / 30
• Subtask 5: 34 / 34