Submission #434707

#	Time	Username	Problem	Language	Result	Execution time	Memory
434707		Yuisuyuno	A Huge Tower (CEOI10_tower)	C++14	80 / 100	2 ms	588 KiB

tower

//Nguyen Huu Hoang Minh
#include <bits/stdc++.h>
#define sz(x) int(x.size())
#define all(x) x.begin(),x.end()
#define reset(x) memset(x, 0,sizeof(x))
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define N 2005
#define remain(x) if (x > MOD) x -= MOD
#define ii pair<int, int>
#define iiii pair< ii , ii >
#define viiii vector< iiii >
#define vi vector<int>
#define vii vector< ii >
#define bit(x, i) (((x) >> (i)) & 1)
#define Task "test"
#define int long long

using namespace std;

typedef long double ld;
const int inf = 1e10;
const int minf = -1e10;
const int mod = 1e9+9;

int n, ar[N], d;

void readfile()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);cout.tie(0);
    if (fopen(Task".inp","r"))
    {
        freopen(Task".inp","r",stdin);
        //freopen(Task".out","w",stdout);
    }
    cin >> n >> d;
    for(int i=1; i<=n; i++) cin >> ar[i];
}

void proc()
{
    sort(ar+1,ar+1+n);
    int r = 1;
    int ans = 1;
    for(int i=1; i<=n; i++){
        while (r < n && ar[r+1] - ar[i] <= d) r++;
        int dis = r-i+1;
        ans = (ans*dis)%mod;
    }
    cout << ans;
}

signed main()
{
    readfile();
    proc();
    return 0;
}

Compilation message (stderr)

tower.cpp: In function 'void readfile()':
tower.cpp:36:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 |         freopen(Task".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
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