Submission #873499

#	Time	Username	Problem	Language	Result	Execution time	Memory
873499		vjudge1	W (RMI18_w)	C++17	0 / 100	40 ms	2108 KiB

w

// #pragma GCC target( "sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
// #pragma GCC optimize("Ofast,unroll-loops,fast-math,O3")  
#include<bits/stdc++.h>
#define f first
#define s second
#define pb push_back
#define sz(x) (int)x.size()
#define bit(a, i) ((a>>i)&1)

using namespace std;
typedef long long ll;
typedef pair<int, int> pii;

const int P = 31;
const int K = 400;
const ll inf = 1e9;
const ll INF = 1e18;
const int mod = 1e9+7;
const int maxn = 3e5 + 10;
const int dx[] = {0, 0, -1, 1};
const int dy[] = {1, -1, 0, 0};

int n;
int cnt[2];
int a[maxn];

void ihtw(){
    cin >> n;
    for(int i=1; i<=n; i++){
        cin >> a[i];
    } sort(a+1, a+n+1);
    for(int i=1; i<=n; i++){
        if(a[i] > a[1]) cnt[1]++;
        else cnt[0]++;
    } ll ans = 0;
    for(int i=1; i<cnt[0]; i++){
        ans = (ans + (cnt[1]-1) * 1ll * (cnt[0]-i-1)) % mod;
    }
    for(int i=1; i<cnt[1]; i++){
        ans = (ans + (cnt[0]-1) * 1ll * (cnt[1]-i-1)) % mod;
    } cout << ans;
}   

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    int t=1;
    while(t--) ihtw();
}   

• Subtask 1: 0 / 20
• Subtask 2: 0 / 30
• Subtask 3: 0 / 50