Submission #989947

#	Time	Username	Problem	Language	Result	Execution time	Memory
989947		LucaIlie	Homework (CEOI22_homework)	C++17	100 / 100	178 ms	137320 KiB

Main

#include <iostream>
#include <stack>

using namespace std;
string s;
int cnt, n;
#define nmax 4000001

int lSon[nmax], rSon[nmax], parent[nmax], arb[nmax], minn[nmax], maxx[nmax], sizee[nmax];
// 0 - frunza, 1 - maxim, -1 - minim


int is_min( int i ) {
    if( s[i] == 'm' && s[i + 1] == 'i' && s[i + 2] == 'n' )
        return 1;
    return 0;
}

int is_max( int i ) {
    if( s[i] == 'm' && s[i + 1] == 'a' && s[i + 2] == 'x' )
        return 1;
    return 0;
}

void init( int l, int vf ) {
    if( l >= n )
        return;
    //cout << l << " " << vf << "\n";
    if( is_min( l ) ) {
        arb[vf] = -1;
        cnt++;
        lSon[vf] = cnt;
        parent[cnt] = vf;
        init( l + 4, cnt );
    } else if( is_max( l ) ) {
        arb[vf] = 1;
        cnt++;
        lSon[vf] = cnt;
        parent[cnt] = vf;
        init( l + 4, cnt );
    } else if( s[l] == ',' ) {
        cnt++;
        parent[cnt] = parent[vf];
        rSon[parent[vf]] = cnt;
        init( l + 1, cnt );
    } else if( s[l] == ')' ) {
        init( l + 1, parent[vf] );
    } else {
        init( l + 1, vf );
    }
}

void dfs( int vf ) {
    if( arb[vf] == 0 ) {
        sizee[vf] = 1;
        minn[vf] = maxx[vf] = 1;
        //cout << vf << " " << arb[vf];
        //cout << "\n";
        return;
    }
    dfs( lSon[vf] );
    dfs( rSon[vf] );
    sizee[vf] = sizee[lSon[vf]] + sizee[rSon[vf]];
    if( arb[vf] == -1 ) {
        minn[vf] = min( minn[lSon[vf]], minn[rSon[vf]] );
        maxx[vf] = maxx[lSon[vf]] + maxx[rSon[vf]] - 1;
    } else {
        minn[vf] = minn[lSon[vf]] + minn[rSon[vf]];
        maxx[vf] = max( sizee[lSon[vf]] + maxx[rSon[vf]], sizee[rSon[vf]] + maxx[lSon[vf]] );
    }
    //cout << vf << " " << arb[vf] << " ";
    //cout << maxx[vf] << " " << minn[vf] << " " << sizee[vf] << "\n";
}

int main() {
    cin >> s;
    n = s.size();
    cnt = 1;
    init( 0, 1 );
    dfs( 1 );
    cout << 1 - minn[1] + maxx[1];
    return 0;
}

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