Kolikot

input/code.cpp: In function 'int main()':
input/code.cpp:56:3: error: 'timer' was not declared in this scope
   timer = perms.size();
   ^

#include <iostream>
#include <vector>
#include <string>
#include <sstream>
#include <math.h>
#include <algorithm>
 
using namespace std;
 
unsigned long n;
string inf;
string ins;
string tmp;
unsigned long index;
vector<unsigned long> perms;
 
int main(){
	
	getline(cin, inf);
	n = stoul(inf);
	
	unsigned long x[n];
	
	getline(cin, ins);
	stringstream t(ins);
	
	index = 0;
	while(t >> tmp){
		x[index] = stoul(tmp);
		index++;
	}
	
	if(n == 1){
		cout << x[0];
		return 0;
	}
	
	sort(x, x + n);
 
	perms.push_back(x[0]);
	perms.push_back(x[1]);
	perms.push_back(x[1]+x[0]);
	
	index = 0;
	for(short i = 0; i < 3; i++){
		if(perms[i] == index + 1){
			index++;
		}
	}
	
	for(unsigned long i = 2; i < n; i++){
		perms.push_back(x[i]);
		if(perms[perms.size() - 1] == index + 1){
			index++;
		}
		timer = perms.size();
		for(unsigned long j = 0; j < timer - 1; j++){
			perms.push_back(perms[j] + x[i]);
			if(perms[perms.size() - 1] == index + 1){
				index++;
			}
		}
		if(i > index){
			break;
		}
	}
	
	cout << index << endl;
	
	return 0;
	
}