Submission #1106322

#	Time	Username	Problem	Language	Result	Execution time	Memory
1106322		Zero_OP	Dancing Elephants (IOI11_elephants)	C++14	26 / 100	9064 ms	12880 KiB

elephants

#include <bits/stdc++.h>

#ifndef LOCAL
    #include "elephants.h"
#endif // LOCAL

using namespace std;

int n, l;
vector<int> x;
map<int, int> cnt;

void init(int N, int L, int X[]){
    n = N;
    l = L;
    x.resize(N);
    for(int i = 0; i < N; ++i) x[i] = X[i];

    for(int i = 0; i < N; ++i){
        ++cnt[X[i]];
    }
}

int greedy(){
    int last = -1, ans = 0;
    for(auto [x, y] : cnt){
        if(!y) assert(false);
        if(last < x) ++ans, last = x + l;
    }
    return ans;
}

int update(int i, int y){
    if(!(--cnt[x[i]])) cnt.erase(cnt.find(x[i]));
    x[i] = y;
    ++cnt[x[i]];

    return greedy();
}

#ifdef LOCAL
    int main(){
        ios_base::sync_with_stdio(0); cin.tie(0);

        int X[4] = {10, 15, 17, 20};
        init(4, 10, X);
        cout << update(2, 16) << '\n';
        cout << update(1, 25) << '\n';
        cout << update(3, 35) << '\n';
        cout << update(0, 38) << '\n';
        cout << update(2, 0) << '\n';

        return 0;
    }
#endif // LOCAL

Compilation message (stderr)

elephants.cpp: In function 'int greedy()':
elephants.cpp:26:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   26 |     for(auto [x, y] : cnt){
      |              ^

• Subtask 1: 10 / 10
• Subtask 2: 16 / 16
• Subtask 3: 0 / 24
• Subtask 4: 0 / 47
• Subtask 5: 0 / 3