Submission #767039

#	Time	Username	Problem	Language	Result	Execution time	Memory
767039		YassineBenYounes	Secret (JOI14_secret)	C++17	100 / 100	381 ms	8224 KiB

secret

#include<bits/stdc++.h>
#include "secret.h"
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef double db;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define pbds tree<pair<int, int>, null_type, less<pair<int, int>>,rb_tree_tag, tree_order_statistics_node_update>
using namespace __gnu_pbds;
ll gcd(ll a , ll b) {return b ? gcd(b , a % b) : a ;} // greatest common divisor (PGCD)
ll lcm(ll a , ll b) {return (a * b) / gcd(a , b);} // least common multiple (PPCM)
int dx[8] = {1, 0, 0, -1, 1, 1, -1, -1};
int dy[8] = {0, 1, -1, 0, 1, -1, -1, 1};
#define endl "\n"
#define ss second
#define ff first
#define all(x) (x).begin() , (x).end()
#define pb push_back
#define vi vector<int>
#define vii vector<pair<int,int>>
#define vl vector<ll>
#define vll vector<pair<ll,ll>>
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pdd  pair<double,double>
#define vdd  vector<pdd>
#define speed ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
using namespace std;
////////////////////Only Clear Code//////////////////////////

void usaco_problem(){
    freopen("milkvisits.in", "r", stdin);
    freopen("milkvisits.out", "w", stdout);
}

void init(){
    #ifndef ONLINE_JUDGE
 
freopen("input.txt", "r", stdin);
 
freopen("output.txt", "w", stdout);
 
#endif // ONLINE_JUDGE
}

const int mx = 1005;
const int LOG = 25;
const int inf = 1e9;
const ll mod = 1e9+7;

int range[mx][mx];

void Solve(int left, int right) {
  int mid, i;
  if (right - left <= 1) {
    return;
  }
  mid = (left + right) / 2;
  for (i = mid - 1; i >= left; --i) {
    if (range[i][mid] == -1) {
      range[i][mid] = Secret(range[i][i + 1], range[i + 1][mid]);
    }
  }
  for (i = mid + 1; i <= right; ++i) {
    if (range[mid][i] == -1) {
      range[mid][i] = Secret(range[mid][i - 1], range[i - 1][i]);
    }
  }
  Solve(left, mid);
  Solve(mid, right);
}

void Init(int N, int A[]) {
  int i, j;
  for (i = 0; i <= N; ++i) {
    for (j = 0; j <= N; ++j) {
      range[i][j] = -1;
    }
  }
  for (i = 0; i < N; ++i) {
    range[i][i + 1] = A[i];
  }
  Solve(0, N);
}

int Query(int L, int R) {
  int i;
  for (i = L + 1; i <= R; ++i) {
    if (range[L][i] != -1 && range[i][R + 1] != -1) {
      return Secret(range[L][i], range[i][R + 1]);
    }
  }
  return range[L][R + 1];
}

/*
void run_case(){
    int n;cin >> n;
}

int main(){
    init();
    speed;
    int t;
    cin >> t;
    //t = 1;
    while(t--){
        run_case();
    }
}*/

/*
    NEVER GIVE UP!
    DOING SMTHNG IS BETTER THAN DOING NTHNG!!!
    Your Guide when stuck:
    - Continue keyword only after reading the whole input
    - Don't use memset with testcases
    - Check for corner cases(n=1, n=0)
    - Check where you declare n(Be careful of declaring it globally and in main)
*/

Compilation message (stderr)

secret.cpp: In function 'void usaco_problem()':
secret.cpp:33:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |     freopen("milkvisits.in", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
secret.cpp:34:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   34 |     freopen("milkvisits.out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
secret.cpp: In function 'void init()':
secret.cpp:40:8: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 | freopen("input.txt", "r", stdin);
      | ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
secret.cpp:42:8: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   42 | freopen("output.txt", "w", stdout);
      | ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 100 / 100