DMOJ · sort1

Bubble Sort

This C++ solution uses simulation for DMOJ sort1 Bubble Sort. Read the reasoning, inspect the code, or try your own test case below.

sort1Arrays & prefix sumsSimulationC++32 lines
Solution037of 248
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Approach

Simulation

Bubble Sort asks to print the initial array and the array after every adjacent swap; the code does exactly that.

Arrays & prefix sums

Problem and code

Useful links.

Written by benbenyaojifen. Try the problem first, then compare your approach with the code.

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Implementation

bubble_sort.cpp

C++

    #include <bits/stdc++.h>
     
    using namespace std;
     
    void print(const vector<int> &v){
        for(int i = 0; i < v.size(); i++){
            cout << v[i] << (i == v.size() - 1 ? "\n" : " ");
        }
    }
    int main(){
        ios::sync_with_stdio(0);
        cin.tie(0);
        int n;
        cin >> n;
        vector<int> v(n);
        for(int i = 0; i < n; i++){
            cin >> v[i];
        }
        print(v);
        for(int i = 0; i < v.size(); i++){
            bool good = false;
            for(int j = 0; j < v.size() - i - 1; j++){
                if(v[j] > v[j + 1]) {
                    swap(v[j], v[j + 1]);
                    print(v);
                    good = true;
                }
            }
            if(!good) break;
        }
        return 0;
    }
        

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