Submission #867175

#	Time	Username	Problem	Language	Result	Execution time	Memory
867175		PagodePaiva	Homework (CEOI22_homework)	C++17	53 / 100	1014 ms	54152 KiB

Main

#include<bits/stdc++.h>

using namespace std;

string s;
map <int, int> virgulas;

int solve(int l, int r){
    if(l == r){
        return 1;
    }

    int con = 0;
    int mid;

    for(int i = l+4;i <= r;i++){    
        if(s[i] == '(') con++;
        else if(s[i] == ')') con--;

        if(con == 0 and s[i] == ','){
            mid = i;
            break;
        }
    }

    int a = solve(l+4, mid-1);
    int b = solve(mid+1, r-1);
    if(s[l+1] == 'i'){
        return min(a, b);
    }

    return a+b;
}

int solve2(int l, int r){
    // cout << l << ' ' << r << '\n';

    if(l == r){
        return 1;
    }

    int con = 0;
    int mid = virgulas[l];

    int a = solve2(l+4, mid-1);
    int b = solve2(mid+1, r-1);

    if(s[l+1] == 'a'){
        return min(a, b);
    }

    return a+b;
}

int main(){
    cin >> s;

    int con = 0;
    stack <int> q;

    for(int i = 0;i < s.size();i++){
        if(s[i] ==  '?') con++;
        if(s[i] == 'm') q.push(i);
        if(s[i] == ')') q.pop();
        if(s[i] == ',') virgulas[q.top()] = i;
    }
    int a = solve(0, s.size()-1);    
    int b = solve2(0, s.size()-1);
    b = con-b+1;

    cout << b-a+1 << '\n';
}

Compilation message (stderr)

Main.cpp: In function 'int solve2(int, int)':
Main.cpp:42:9: warning: unused variable 'con' [-Wunused-variable]
   42 |     int con = 0;
      |         ^~~
Main.cpp: In function 'int main()':
Main.cpp:61:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   61 |     for(int i = 0;i < s.size();i++){
      |                   ~~^~~~~~~~~~
Main.cpp: In function 'int solve(int, int)':
Main.cpp:27:18: warning: 'mid' may be used uninitialized in this function [-Wmaybe-uninitialized]
   27 |     int b = solve(mid+1, r-1);
      |             ~~~~~^~~~~~~~~~~~

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