Submission #865537

#	Time	Username	Problem	Language	Result	Execution time	Memory
865537		mychecksedad	Homework (CEOI22_homework)	C++17	100 / 100	173 ms	205152 KiB

Main

/* Author : Mychecksdead  */
#include<bits/stdc++.h>
using namespace std;
#define ll long long int
#define MOD (1000000000+7)
#define MOD1 (998244353)
#define pb push_back
#define all(x) x.begin(), x.end()
#define en cout << '\n'
const int N = 3e6+100, M = 1e5+10, K = 52, MX = 30;

vector<int> g[N];
vector<int> tp;
int sz[N];
pair<int, int> dfs(int v){
  sz[v] = tp[v] == 2;
  if(tp[v] == 2) return {1, 1};
  pair<int, int> x = dfs(g[v][0]);
  pair<int, int> y = dfs(g[v][1]);
  // cout << g[v][0] << ": " << x.first << ' ' << x.second << '|' << g[v][1] << ": " << y.first << ' ' << y.second << '\n';
  sz[v] += sz[g[v][0]];
  sz[v] += sz[g[v][1]];
  if(tp[v] == 0)
    return {min(x.first, y.first), x.second + y.second - 1};
  return {x.first + y.first, max(sz[g[v][0]] + y.second, x.second + sz[g[v][1]])};
}
string s;
void solve(){
  cin >> s;
  int n = 0, mx = 0, mn = 0;
  int cur = 1;
  tp.resize(s.size()+2);
  vector<int> last;
  for(int i = 0 ; i < s.length(); ++i){
    if(s[i] == '?'){
      tp[cur] = 2;
      if(!last.empty()){
        g[last.back()].pb(cur);
      }

      ++cur;
    }else if(s[i] == '('){
      if(!last.empty()){
        g[last.back()].pb(cur);
      }
      if(s[i - 1] == 'n') tp[cur] = 0;
      else if(s[i - 1] == 'x') tp[cur] = 1;
      last.pb(cur);
      ++cur;
    }else if(s[i] == ')'){
      last.pop_back();
    }
  }
  auto R = dfs(1);

  cout << R.second-R.first+1;
}


int main(){
  cin.tie(0); ios::sync_with_stdio(0);
  int tt = 1, aa;
  // freopen("in.txt", "r", stdin);
  // freopen("out.txt", "w", stdout);
  // cin >> tt;
  while(tt--){
    solve();
    // en;
  }
  cerr<<"time taken : "<<(float)clock()/CLOCKS_PER_SEC<<" seconds\n";
  return 0;
} 

Compilation message (stderr)

Main.cpp: In function 'void solve()':
Main.cpp:34:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |   for(int i = 0 ; i < s.length(); ++i){
      |                   ~~^~~~~~~~~~~~
Main.cpp:30:7: warning: unused variable 'n' [-Wunused-variable]
   30 |   int n = 0, mx = 0, mn = 0;
      |       ^
Main.cpp:30:14: warning: unused variable 'mx' [-Wunused-variable]
   30 |   int n = 0, mx = 0, mn = 0;
      |              ^~
Main.cpp:30:22: warning: unused variable 'mn' [-Wunused-variable]
   30 |   int n = 0, mx = 0, mn = 0;
      |                      ^~
Main.cpp: In function 'int main()':
Main.cpp:62:15: warning: unused variable 'aa' [-Wunused-variable]
   62 |   int tt = 1, aa;
      |               ^~

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