Submission #307655

#	Time	Username	Problem	Language	Result	Execution time	Memory
307655		vivaan_gupta	Counting Mushrooms (IOI20_mushrooms)	C++14	Compilation error	0 ms	0 KiB

mushrooms

		#include <algorithm>
#include <bitset>
#include <cassert>
#include <chrono>
#include <complex>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <deque>
#include <functional>
#include <iomanip>
#include <iostream>
#include <iterator>
#include <limits>
#include <list>
#include <map>
#include <numeric>
#include <queue>
#include <random>
#include <ratio>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>
#include <climits>
// #include "mushrooms.h"
#define ll long long
#define ld long double
#define mp make_pair
#define pb push_back
#define in insert
#define vll vector<ll>
#define endl "\n"
#define pll pair<ll,ll>
#define f first
#define s second
#define FOR(i,a,b) for(int i=(a),_b=(b); i<=_b; i++)
// #define int ll
#define sz(x) (ll)x.size()
#define all(x) (x.begin(),x.end())
using namespace std;

 
const ll INF = 1e12;
const ll N =(1e5+5); // TODO : change value as per problem
const ll MOD = 1e9+7;
int a[N];
int use_machine(vector<int> v){
	int d= 0 ;
	for(int i =0 ;i<v.size()-1;i++){
		d+=(a[v[i]]!=a[v[i+1]]);
	}
	return d;
}
int count_mushrooms(int n){
	int B =0;
	for(int i = 0;i<(n-1);i+=2){
		vector<int> v;
		v.pb(i),v.pb(i+1);
		int x=  use_machine(v);
		if(x == 0){
			vector<int> tmp = {0,i};
			if(use_machine(tmp) == 1)
				B += 2;
			continue;
		}
		B+=1;
	}
	vector<int> v;
	if(n&1){
		v.pb(0);
		v.pb(n-1);
		B += use_machine(v);
	}
	return n-B;
}
signed main(){
	int n;
	cin >> n;
	for(int i = 0;i<n;i++){
		cin >> a[i];
	}
	cout << count_mushrooms(n) << endl;
}

// signed main(){
 
//     ios_base::sync_with_stdio(0);
//     cin.tie(NULL);
//      // freopen(".in","r",stdin);freopen(".out","w",stdout);
    
//      ll tt=1;   
//      // cin >> tt;
//     while(tt--){    
//         solve();
//     }    
// }	

Compilation message (stderr)

mushrooms.cpp: In function 'int use_machine(std::vector<int>)':
mushrooms.cpp:55:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   55 |  for(int i =0 ;i<v.size()-1;i++){
      |                ~^~~~~~~~~~~
/tmp/cc01HFUH.o: In function `use_machine(std::vector<int, std::allocator<int> >)':
stub.cpp:(.text+0x200): multiple definition of `use_machine(std::vector<int, std::allocator<int> >)'
/tmp/cc66hx5t.o:mushrooms.cpp:(.text+0x0): first defined here
/tmp/cc01HFUH.o: In function `main':
stub.cpp:(.text.startup+0x0): multiple definition of `main'
/tmp/cc66hx5t.o:mushrooms.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status