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알고리즘/기타

[HackerRank] Plus Minus

히더 2018. 9. 27. 14:55

출처 : https://www.hackerrank.com/challenges/plus-minus/problem


#include <bits/stdc++.h>


using namespace std;


vector<string> split_string(string);


void plusMinus(vector<int> arr) {

    float n1,n2,n3,s; n1=0;n2=0;n3=0; s=arr.size();

    for(int i=0; i<s; i++) {

        if(arr[i]>0)n1++;

        else if(arr[i]<0)n2++;

        else n3++;

    }

    cout.precision(6);

    cout << n1/s << endl << n2/s << endl << n3/s << endl;

}


int main()

{

    int n;

    cin >> n;

    cin.ignore(numeric_limits<streamsize>::max(), '\n');


    string arr_temp_temp;

    getline(cin, arr_temp_temp);


    vector<string> arr_temp = split_string(arr_temp_temp);


    vector<int> arr(n);


    for (int i = 0; i < n; i++) {

        int arr_item = stoi(arr_temp[i]);


        arr[i] = arr_item;

    }


    plusMinus(arr);


    return 0;

}


vector<string> split_string(string input_string) {

    string::iterator new_end = unique(input_string.begin(), input_string.end(), [] (const char &x, const char &y) {

        return x == y and x == ' ';

    });


    input_string.erase(new_end, input_string.end());


    while (input_string[input_string.length() - 1] == ' ') {

        input_string.pop_back();

    }


    vector<string> splits;

    char delimiter = ' ';


    size_t i = 0;

    size_t pos = input_string.find(delimiter);


    while (pos != string::npos) {

        splits.push_back(input_string.substr(i, pos - i));


        i = pos + 1;

        pos = input_string.find(delimiter, i);

    }


    splits.push_back(input_string.substr(i, min(pos, input_string.length()) - i + 1));


    return splits;

}



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