Submission #1074510

#	Time	Username	Problem	Language	Result	Execution time	Memory
1074510		Nicolaikrob	Rarest Insects (IOI22_insects)	C++17	0 / 100	12 ms	348 KiB

insects

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

int tc, n, ra = 0;
vi M, IS, U;

void mi(int i) {
    if(U[IS[i]]) move_inside(IS[i]);
    M.push_back(IS[i]);
}

void mo(int i = 0) {
    if(U[IS[i]]) move_outside(M.back());
    M.pop_back();
}

int pb() {
    return press_button()+ra;
}

bool tjek(int g) {
    int ctr = n;
    //while(M.size() > 1) mo();
    for(int i = 0; i < n; i++) {
        mi(i);
        if(pb() > g) ctr--, mo(i);
    }
    if(ctr == g*tc) {
        for(auto x : M)
            move_outside(x), U[x] = 0;
        ra += g;
        return 1;
    }
    else {
        return 0;
    }
}

int min_cardinality(int N) {
	tc = n = N;
    IS.resize(n);
    for(int i = 0; i < n; i++) IS[i] = i;
    srand(time(NULL));
    random_shuffle(IS.begin(), IS.end());
    U.resize(n, 1);
    mi(0);
    for(int i = 1; i < n; i++) {
        mi(i);
        if(pb() > 1) tc--, mo(i);
    }
    for(auto x : M)
        U[x] = 0, move_outside(x);
    ra += 1;
    int l = 1, u = n/tc;
    while(l < u) {
        int g = (l+u+1)/2;
        if(tjek(g)) l = g;
        else u = g-1;
    }
    return l;
}


/*
11
1 3 3 7 1 3 5 7 5 1 3
*/

• Subtask 1: 0 / 10
• Subtask 2: 0 / 15
• Subtask 3: 0 / 75