Submission #772778

#	Time	Username	Problem	Language	Result	Execution time	Memory
772778		Valters07	Homework (CEOI22_homework)	C++14	100 / 100	153 ms	131416 KiB

Main

#include <bits/stdc++.h>
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,popcnt,lzcnt")
#define fio ios_base::sync_with_stdio(0);cin.tie(0);
#define ll long long
#define en cin.close();return 0;
#define pb push_back
#define fi first//printf("%lli\n",cur);
#define se second//scanf("%lli",&n);
using namespace std;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const int N = 1e6+5;
vector<int> mid[N];
string str;
pair<int,int> go2(int l, int r, int op)
{
    if(l==r)
        return {0,0};
    int pos = mid[op].back();
    mid[op].pop_back();
    auto l1 = go2(l+4,pos-1,op+1), r1 = go2(pos+1,r-1,op+1);
    if(str[l+1]=='i')
        return {min(l1.fi,r1.fi),l1.se+r1.se+1};
    else
        return {l1.fi+r1.fi+1,min(l1.se,r1.se)};
}
int main()
{
    fio
//    ifstream cin("in.in");
    cin >> str;
    int n = 0, op = 0;
    for(int i = str.size()-1;i>=0;i--)
    {
        n+=(str[i]=='?');
        op+=(str[i]==')')-(str[i]=='(');
        if(str[i]==',')
            mid[op].pb(i);
    }
    auto t = go2(0,str.size()-1,1);
    cout << n-t.fi-t.se << endl;
//    cin.close();
    return 0;
}

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