Cod sursa(job #3166600)

Utilizator Paul281881818818181991919191881818Draghici Paul Paul281881818818181991919191881818 Data 9 noiembrie 2023 09:09:16
Problema Indep Scor 0
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.67 kb
#include <fstream>
#define N 501
std::ifstream fin("indep.in");
std::ofstream fout("indep.out");
int n, arr[N], dp[N][N];
int cmmdc(int a, int b){
    if(b == 0)
        return a;
    return cmmdc(b, a % b);
}
int main(){
    std::cin >> n;
    int mx = -1;
    for(int i = 1; i <= n; i++){
        std::cin >> arr[i];
        dp[i][arr[i]] = 1;
        mx = std::max(arr[i], mx);
    }
    for(int i = 2; i <= n; i++)
        for(int k = 1; k < i; k++)
            for(int g = 1; g <= mx; g++)
                dp[i][cmmdc(g, arr[i])] += dp[k][g];

    int sum = 0;
    for(int i = 1; i <= n; i++){
        sum += dp[i][1];
    }
    std::cout << sum;
}