Submission #204907

#	Time	Username	Problem	Language	Result	Execution time	Memory
204907		Haunted_Cpp	Mean (info1cup19_mean)	C++17	100 / 100	7 ms	508 KiB

mean

#include <iostream>
#include <vector>
#include <map>
#include <set>
#include <stack>
#include <algorithm>
#include <cstring>
#include <cassert>
using namespace std;
 
#define FOR(i, a, b) for (int i = a; i < (int) b; i++)
#define F0R(i, a) FOR(i, 0, a)
#define ROF(i, a, b) for (int i = a; i >= (int) b; i--)
#define R0F(i, a) ROF(i, a, 0)
#define GO(i, a) for (auto i : a)
 
#define f first
#define s second
#define eb emplace_back
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
 
typedef vector<int> vi;
typedef pair<int, int> pii;
typedef vector<pii> vpii;
typedef vector<vi> vvi;
typedef vector<vpii> vvpii;
typedef long long i64;
typedef vector<i64> vi64;
 
const int dr[] = {+1, -1, +0, +0, +1, -1, +1, -1};
const int dc[] = {+0, +0, +1, -1, +1, -1, -1, +1};
const int ms[] = {+31, +29, +31, 30, +31, +30, +31, +31, +30, +31, +30, +31};

void setIO(string nome) {
  ios_base::sync_with_stdio(0); cin.tie(0);
  freopen ((nome + ".in").c_str(), "r", stdin);
  freopen ((nome + ".out").c_str(), "w", stdout);
}

const int N = 2e2 + 5;
int dp [N][N];

int main () {
  ios_base::sync_with_stdio(0); 
  cin.tie(0);
  int n;
  cin >> n;
  F0R (i, n) {
    int foo;
    cin >> foo;
    dp[i][i] = foo;
  }
  for (int tamanho = 2; tamanho <= n; tamanho++) {
    for (int left = 0; left + tamanho <= n; left++) {
      int right = left + tamanho - 1;
      for (int k = left; k < right; k++) {
        dp[left][right] = max (dp[left][right], (dp[left][k] + dp[k + 1][right]) / 2);
      } 
    }
  }
  cout << dp[0][n - 1] << '\n';
  return 0;
}

Compilation message (stderr)

mean.cpp: In function 'void setIO(std::__cxx11::string)':
mean.cpp:38:11: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   freopen ((nome + ".in").c_str(), "r", stdin);
   ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
mean.cpp:39:11: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   freopen ((nome + ".out").c_str(), "w", stdout);
   ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 30 / 30
• Subtask 2: 70 / 70