Submission #1003254

#	Time	Username	Problem	Language	Result	Execution time	Memory
1003254		thelepi	Kemija (COCI22_kemija)	C++17	50 / 50	1 ms	604 KiB

Main

#include <iostream>
#include <string>
#include <cassert>

using namespace std;

void parseMolecule(int atoms[], string equ, int a, int b){
  int multiplier = 1;
  bool isnew = true;
  char atom = ' ';
  for (int j = a; j < b; j++){
    char t = equ[j];
    if(t - '0' >= 0 && t - '0' < 10){
      if(isnew){
        multiplier = t - '0';
        isnew = false;
      }
      else{
        assert((atom != ' '));
        atoms[atom - 'A'] += (t - '0') * multiplier;
        atom = ' ';
      }
    }
    else if(t - 'A' >= 0 && t - 'A' < 26){
      isnew = false;
      if(atom != ' '){
        atoms[atom - 'A'] += multiplier;
      }
      atom = t;
    }
  }
  if(atom != ' '){
    atoms[atom - 'A'] += multiplier;
  }
}


int main(int, char **)
{
  int n;
  cin >> n;
  for (int i = 0; i < n; i++)
  {
    string equ;
    cin >> equ;
    
    int left[26] = {};
    int right[26] = {};
    int arrow = equ.find("->");
    assert((arrow != equ.npos));
    int a = 0;
    int b = equ.find_first_of('+');

    while(b <= arrow && b != equ.npos){
      parseMolecule(left, equ, a, b);
      a = b + 1;
      b = equ.find_first_of('+', a);
    }
    parseMolecule(left, equ, a, arrow);
    a = arrow + 2;
    b = equ.find_first_of('+', a);
    while(b != equ.npos){
      parseMolecule(right, equ, a, b);
      a = b + 1;
      b = equ.find_first_of('+', a);
    }
    parseMolecule(right, equ, a, equ.size());
    bool ok = true;
    for (int i = 0; i < 26; i++)
    {
      if(left[i] != right[i]){
        ok = false;
      }
    }
    cout << (ok ? "DA\n" : "NE\n");
  }
}

Compilation message (stderr)

In file included from /usr/include/c++/10/cassert:44,
                 from Main.cpp:3:
Main.cpp: In function 'int main(int, char**)':
Main.cpp:50:19: warning: comparison of integer expressions of different signedness: 'int' and 'const size_type' {aka 'const long unsigned int'} [-Wsign-compare]
   50 |     assert((arrow != equ.npos));
Main.cpp:54:27: warning: comparison of integer expressions of different signedness: 'int' and 'const size_type' {aka 'const long unsigned int'} [-Wsign-compare]
   54 |     while(b <= arrow && b != equ.npos){
Main.cpp:62:13: warning: comparison of integer expressions of different signedness: 'int' and 'const size_type' {aka 'const long unsigned int'} [-Wsign-compare]
   62 |     while(b != equ.npos){

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 30 / 30