Submission #1335727

#	Time	Username	Problem	Language	Result	Execution time	Memory
1335727		yhkhoo	Rarest Insects (IOI22_insects)	C++17	Compilation error	0 ms	0 KiB

insects

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

#define qry() press_button()
#define in(x) move_inside(x)
#define out(x) move_outside(x)
#define vi basic_string<int>

int min_cardinality(int n) {
    vi f, nf;
    for(int i=0; i<n; i++){
        in(i);
        if(qry() == 1){
            f += i;
        }
        else{
            out(i);
            nf += i;
        }
    }
    int l = 1, r = n / f.size(), m;
    vector<bool> cur(n), good(n);
    bool down = 0;
    while(l < r){
        m = (l+r+1)/2;
        for(auto i: nf){
            if(down){
                if(cur[i]){
                    out(i);
                    if(qry() <= m){
                        in(i);
                        cur[i] = 1;
                    }
                    else{
                        cur[i] = 0;
                    }
                }
            }
            else{
                if(!good[i]){
                    in(i);
                    if(qry() > m){
                        out(i);
                        cur[i] = 0;
                    }
                    else{
                        cur[i] = 1;
                    }
                }
            }
        }
        int cnt = count(cur.begin(), cur.end(), 1);
        if(cnt != (m-1) * f.size()){ // m too big
            r = m-1;
            down = 1;
        }
        else{ // m ok
            l = m;
            down = 0;
            for(auto i: nf | views::filter([&](int i){return cur[i];})){
                good[i] = 1;
            }
        }
    }
    return l;
}

Compilation message (stderr)

insects.cpp: In function 'int min_cardinality(int)':
insects.cpp:61:30: error: 'views' has not been declared
   61 |             for(auto i: nf | views::filter([&](int i){return cur[i];})){
      |                              ^~~~~