func_code_string: #include <bits/stdc++.h>   using namespace std;   int a[1 << 18];   long long sum[1 << 18];   int p[1 << 18];   int n, T, m;   double c;   void Calc() {     double mean = 0.0;     for (int i = 0, j = 0; i < n && j < m; i++) {       mean = (mean + (a[i] + .0) / T) / c;       if (i == p[j] - 1) {         double real = (.0 + sum[i + 1] - sum[i - T + 1]) / T;         printf( %.9lf  , real);         printf( %.9lf  , mean);         printf( %.9lf n , fabs(real - mean) / real);         j++;       }     }   }   int main() {     scanf( %d%d%lf , &n, &T, &c);     for (int i = 0; i < n; i++) {       scanf( %d , &a[i]);       sum[i + 1] = sum[i] + a[i];     }     scanf( %d , &m);     for (int i = 0; i < m; i++) scanf( %d , &p[i]);     Calc();     return 0;   }   