【題目敘述】https://zerojudge.tw/ShowProblem?problemid=f444 (考生答對率: 17.9%)
#include <iostream>
#include <string>
#include <sstream>
#include <vector>
#include <algorithm>
using namespace std;
string s;
int x;
vector <int> v;
int main() {
while (cin >> x){
getline(cin, s);
getline(cin, s);
//cout << "s: " << s << "\n";
stringstream ss(s);
v.clear();
while (ss >> s){
v.push_back(stoi(s));
}
v.pop_back();
reverse(v.begin(), v.end());
long long mul = 1;
int ans = 0;
for (int i = 0; i < v.size(); i++){
//cout << "i: " << i << " " << v[i] << " " << ans << " " << mul << "\n";
ans += v[i]*(i+1)*mul;
mul *= x;
}
cout << ans << "\n";
}
}
Python code (credit: Amy Chou)
while True:
try:
x = int(input())
A = list(map(int, input().strip().split()))
ans = 0
n = len(A) - 1
for i in range(n):
ans += A[i] * (n-i) * pow(x, n-1-i)
print(int(ans))
except:
break