Submission #1292961

#	Time	Username	Problem	Language	Result	Execution time	Memory
1292961		trandangquang	Homework (CEOI22_homework)	C++20	100 / 100	93 ms	109176 KiB

Main

#include<bits/stdc++.h>
using namespace std;

#define foru(i,a,b) for(int i=(a); i<=(b); ++i)
#define ford(i,a,b) for(int i=(a); i>=(b); --i)
#define rep(i,a) for(int i=0; i<(a); ++i)
#define sz(a) (int)(a).size()
#define all(a) (a).begin(),(a).end()
#define bit(s,i) (((s)>>(i))&1)
#define vi vector<int>
#define vii vector<ii>
#define ii pair<int,int>
#define fi first
#define se second
#define pb push_back
#define eb emplace_back
#define ll long long
#define _ << " " <<

template <class X, class Y> bool maxi(X &x, Y y){return x<y?x=y,true:false;}
template <class X, class Y> bool mini(X &x, Y y){return x>y?x=y,true:false;}

const int N=2e7+5;

int pos,cur,num[N],l[N],r[N];
string s;

int dfs(){
    if(s[pos]=='?'){
        ++cur;
        num[cur]=1;
        l[cur]=r[cur]=1;
        ++pos;
        return cur;
    }
    int ahihi=++cur;

    int sign;
    if(s.substr(pos,3)=="min") sign=0;
    else sign=1;
    pos+=3;

    ++pos; int ln=dfs();
    ++pos; int rn=dfs();
    ++pos;

    num[ahihi]=num[ln]+num[rn];
    if(sign==0){
        l[ahihi]=min(l[ln],l[rn]);
        r[ahihi]=r[ln]+r[rn]-1;
    } else{
        l[ahihi]=l[ln]+l[rn];
        r[ahihi]=max(r[ln]+num[rn],r[rn]+num[ln]);
    }

//    cout<<cur _ l[cur] _ r[cur]<<'\n';
    return ahihi;
}

void solve(){
    cin>>s;
    int root=dfs();
//    cout<<l[root] _ r[root]<<'\n';
    cout<<r[root]-l[root]+1<<'\n';
}

int32_t main(){
    #define task "test"
    if(fopen(task".inp","r")){
        freopen(task".inp","r",stdin);
        freopen(task".out","w",stdout);
    }
    cin.tie(0)->sync_with_stdio(0);

    int tc=1; //cin>>tc;
    rep(i,tc){
        solve();
    }
}

Compilation message (stderr)

Main.cpp: In function 'int32_t main()':
Main.cpp:70:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   70 |         freopen(task".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
Main.cpp:71:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   71 |         freopen(task".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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