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- #include <iostream>
- #include <string>
- #include <cstring>
- #include <map>
- using namespace std;
- typedef long long ll;
- const int maxn = 505;
- ll potions[maxn];
- ll dp[maxn][maxn];
- ll sum(int i, int j) {
- ll result = 0;
- for(int k = i; k <= j; k++) {
- result += potions[k];
- }
- return result % 100;
- }
- ll rec(int i, int j) {
- if(i + 1 == j) {
- return potions[i] * potions[j];
- }
- if(i >= j) {
- return 0;
- }
- if(dp[i][j] != -1) {
- return dp[i][j];
- }
- ll result = 2e15;
- for(int k = i; k < j; k++) {
- result = min(result, rec(i, k) + rec(k + 1, j) + sum(i, k) * sum(k + 1, j));
- }
- return dp[i][j] = result;
- }
- int main() {
- ios_base::sync_with_stdio(false);
- int n;
- while(cin >> n) {
- for(int i = 0; i < n; i++) {
- cin >> potions[i];
- }
- memset(dp, -1, sizeof dp);
- cout << rec(0, n - 1) << endl;
- }
- return 0;
- }
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