Submission #669066

#	Time	Username	Problem	Language	Result	Execution time	Memory
669066		ktkerem	Homework (CEOI22_homework)	C++17	53 / 100	155 ms	184036 KiB

Main

/*#pragma GCC target ("avx2")
#pragma GCC optimize ("O3")
#pragma GCC optimize("Ofast")
#pragma GCC optimize ("unroll-loops")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")/**/
#include<bits/stdc++.h>
/**/
//typedef int ll;
typedef long long ll;
typedef unsigned long long ull;
typedef std::string str;
//typedef vector<std::vector<ll>> vv; 
/*typedef __int128 vll;
typedef unsigned __int128 uvll;*/
#define llll std::pair<ll , ll>
#define pb push_back
#define pf push_front
#define halo cout << "hello\n"
#define fi first
#define sec second
#define vv(x) std::vector<std::vector<x>>
#define all(a) a.begin() , a.end()
const ll limit = 1e15+7; 
const ll ous = 1e6 + 7;
const ll dx[4] = {-1 , 0 , 1 , 0} , dy[4] = {0,1,0,-1};
ll n;std::vector<ll> adj[ous];ll x = 0;
ll ff = 0;std::string s;
ll typ[ous];
void buildadj(ll prv){
    ll crt = ff++;
    if(s[x++] == '?'){
        n++;
        typ[crt] = 0;
        if(prv < 0){
            return;
        }
        adj[crt].pb(prv);
        adj[prv].pb(crt);
        return;
    }
    char c = s[x];
    x+=3;
    buildadj(crt);
    x++;
    buildadj(crt);
    x++;
    if(c == 'i'){
        typ[crt] = 1;
    }
    else{
        typ[crt] = 2;
    }
    if(prv >= 0){
        adj[prv].pb(crt);
        adj[crt].pb(prv);
    }
} 
llll dfs(ll crt , ll prv = -1){
    if(typ[crt] == 0){
        return{1 , n};
    }
    else if(typ[crt] == 1){
        std::vector<llll> v;
        for(auto j:adj[crt]){
            if(j != prv){
                v.pb(dfs(j , crt));
            }
        }
        assert(v.size() >= 2);
        //std::cout << v.size() << std::endl;
        return {std::min(v[0].fi , v[1].fi) , v[0].sec + v[1].sec - n - 1};
    }
    else{
        std::vector<llll> v;
        for(auto j:adj[crt]){
            if(j != prv){
                v.pb(dfs(j , crt));
            }
        }
        assert(v.size() >= 2);
        //std::cout << v.size() << std::endl;
        return {v[0].fi + v[1].fi , std::max(v[0].sec , v[1].sec)};
    }
    return {0 , 0};
}
void solve(){
    std::cin >> s;
    buildadj(-1);
    llll ans = dfs(0);
    std::cout << ans.sec - ans.fi + 1 << "\n";
    return;
}
signed main(){
    std::ios_base::sync_with_stdio(false);std::cin.tie(NULL);
    ll t=1;
    //std::cin >> t;
    ll o = 1;
    while(t--){ 
        solve();        
    }
    return 0;
}/**/

Compilation message (stderr)

Main.cpp:5:78: warning: "/*" within comment [-Wcomment]
    5 | #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")/**/
      |                                                                               
Main.cpp: In function 'int main()':
Main.cpp:97:8: warning: unused variable 'o' [-Wunused-variable]
   97 |     ll o = 1;
      |        ^

• Subtask 1: 10 / 10
• Subtask 2: 13 / 13
• Subtask 3: 0 / 13
• Subtask 4: 30 / 30
• Subtask 5: 0 / 34