Submission #222539

#	Time	Username	Problem	Language	Result	Execution time	Memory
222539		lyc	Popcount (COCI19_popcount)	C++14	30 / 110	5 ms	384 KiB

popcount

#include <bits/stdc++.h>
using namespace std;

#define SZ(x) (int)(x).size()
#define FOR(i,a,b) for(int i=(a);i<=(b);++i)
#define RFOR(i,a,b) for (int i=(a);i>=(b);--i)

int f(int A, int N) {
    cout << ((1<<N)-1) << " " << (1<<1) << " :: " << (A&((1<<N)-(1<<1))) << " " << ((A>>1)&1) << endl;
    return ((A&(((1<<N)-1)-(1<<1)))+((A>>1)&1));
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);

    int N, K; cin >> N >> K;

    vector<string> ans;
    for (int i = 1; i <= N-1; i += 4) {
        string cur = "A=", ms = "";
        vector<string> mask;
        vector<string> stk;
        for (int j = 0; j < 4 && i+j <= N-1; ++j) {
            mask.push_back("((0-1)-(1<<" + to_string(i+j) + "))");
            stk.push_back("((A>>" + to_string(i+j) + ")&1)");
        }

        FOR(i,0,SZ(mask)-1) ms += "(";
        ms += "A";
        FOR(i,0,SZ(mask)-1) ms += "&" + mask[i] + ")";

        FOR(i,0,SZ(stk)-1) cur += "(";
        cur += ms;
        FOR(i,0,SZ(stk)-1) cur += "+" + stk[i] + ")";

        assert(SZ(cur) <= 1000);
        ans.push_back(cur);
    }

    cout << SZ(ans) << '\n';
    for (auto& s : ans) cout << s << '\n';

    //FOR(i,0,7) cout << f(i,3) << endl;
}

• Subtask 1: 15 / 15
• Subtask 2: 15 / 15
• Subtask 3: 0 / 35
• Subtask 4: 0 / 45