Submission #222532

#	Time	Username	Problem	Language	Result	Execution time	Memory
222532		dwsc	Popcount (COCI19_popcount)	C++14	110 / 110	18 ms	384 KiB

popcount

#include <bits/stdc++.h>
using namespace std;
string add(string s1,string s2){
    vector<int> v;
    int carry = 0;
    if (s1.length() < s2.length()) swap(s1,s2);
    while (s1.length() > s2.length()) s2 = "0"+s2;
    for (int i = s1.length()-1; i >= 0; i--){
        int v1 = s1[i]-48,v2 = s2[i]-48;
        v.push_back((v1+v2+carry)%10);
        carry = (v1+v2+carry)>=10;
    }
    if (carry) v.push_back(carry);
    string s = "";
    for (int i = v.size()-1; i >= 0; i--) s +=(char)(v[i]+48);
    return s;
}
int main(){
    int n,k;
    cin >> n >> k;
    int numboxes = n,boxsize = 1;
    int val = 0,tempn = n;
    while (tempn  != 1){
        val++;
        tempn = (tempn+1)/2;
    }
    cout << val << "\n";
    while (numboxes != 1){
        string bigbox = "0",smallbox = "0";
        int addto = 0;
        int num = 0;
        int bigval = 0,smallval = 0;
        string counter = "1";
        for (int i = 0; i < n; i++){
            num++;
            if (num > boxsize){
                num-=boxsize;
                addto = 1-addto;
            }
            if (addto){
                bigbox = add(bigbox,counter);
            }
            else{
                smallbox = add(smallbox,counter);
            }
            //cout << bigbox << " " << smallbox << "\n";
            counter = add(counter,counter);
            //cout << counter << "hi\n";
        }
        string finalstring = "A=(((A&"+bigbox+")>>"+to_string(boxsize)+")+(A&"+smallbox+"))";
        assert(finalstring.length() <= 1000);
        cout << finalstring << "\n";
        numboxes = (numboxes+1)/2;
        boxsize *= 2;

    }
}

Compilation message (stderr)

popcount.cpp: In function 'int main()':
popcount.cpp:32:13: warning: unused variable 'bigval' [-Wunused-variable]
         int bigval = 0,smallval = 0;
             ^~~~~~
popcount.cpp:32:24: warning: unused variable 'smallval' [-Wunused-variable]
         int bigval = 0,smallval = 0;
                        ^~~~~~~~

• Subtask 1: 15 / 15
• Subtask 2: 15 / 15
• Subtask 3: 35 / 35
• Subtask 4: 45 / 45