Submission #672113

#	Time	Username	Problem	Language	Result	Execution time	Memory
672113		tbzard	Rarest Insects (IOI22_insects)	C++17	Compilation error	0 ms	0 KiB

insects

#include <bits/stdc++.h>
using namespace std;
void move_inside(int i);
void move_outside(int i);
int press_button();

bool vis[2222];
int min_cardinality(int n){
    vector<int> v;
    for(int i=0;i<n;i++){
        move_inside(i);
        int r = press_button();
        if(r == 2) move_outside(i);
        else{
            v.push_back(i);
            vis[i] = 1;
        }
    }

    int ans = n/(int)v.size();
    int lo = 1, hi = ans-1;
    vector<int> add;
    int cnt = 0;
    while(lo <= hi){
        int mid = (lo+hi)/2;

        int r = press_button();
        if(mid >= r){
            for(int i=0;i<n;i++){
                if(vis[i]) continue;

                move_inside(i);
                int r = press_button();
                if(r == mid+2){
                    move_outside(i);
                }
                else{
                    vis[i] = 1;
                    add.push_back(i);
                    cnt++;
                }
            }
        }
        else{
            vector<int> out;
            while(!add.empty()){
                int i = add.back();

                move_outside(i);
                vis[i] = 0;
                add.pop_back();
                cnt--;
                out.push_back(i);
                int r = press_button();
                if(r < mid+2){
                    break;
                }
            }
            for(int j=0;j<(int)out.size()a;j++){
                int i = out[j];
                if(vis[i]) continue;

                move_inside(i);
                if(r == mid+2){
                    move_outside(i);
                }
                else{
                    vis[i] = 1;
                    add.push_back(i);
                    cnt++;
                }

            }
        }

        int cnt = 0;
        if(cnt < (int)v.size()*mid) ans = mid, hi = mid-1;
        else lo = mid+1;
    }

    return ans;
}

Compilation message (stderr)

insects.cpp: In function 'int min_cardinality(int)':
insects.cpp:59:42: error: expected ';' before 'a'
   59 |             for(int j=0;j<(int)out.size()a;j++){
      |                                          ^
      |                                          ;
insects.cpp:59:42: error: 'a' was not declared in this scope
insects.cpp:59:43: error: expected ')' before ';' token
   59 |             for(int j=0;j<(int)out.size()a;j++){
      |                ~                          ^
      |                                           )
insects.cpp:59:13: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   59 |             for(int j=0;j<(int)out.size()a;j++){
      |             ^~~
insects.cpp:59:44: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   59 |             for(int j=0;j<(int)out.size()a;j++){
      |                                            ^
insects.cpp:59:44: error: 'j' was not declared in this scope