Submission #2873718
Source Code Expand
#include <bits/stdc++.h> using namespace std; typedef long long ll; #define MS(a) memset(a,0,sizeof(a)) #define MP make_pair #define PB push_back const int INF = 0x3f3f3f3f; const ll INFLL = 0x3f3f3f3f3f3f3f3fLL; inline ll read(){ ll x=0,f=1;char ch=getchar(); while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();} while(ch>='0'&&ch<='9'){x=x*10+ch-'0';ch=getchar();} return x*f; } ////////////////////////////////////////////////////////////////////////// const int maxn = 2e5+10; ll n,k,x,s[maxn],tree[maxn*4]; vector<ll> v; void add(ll x){ while(x < maxn){ tree[x] += 1; x += x&-x; } } ll sum(ll x){ ll res = 0; while(x > 0){ res += tree[x]; x -= x&-x; } return res; } int main(){ cin >> n >> k; for(int i=1; i<=n; i++){ x = read(); x -= k; s[i] = s[i-1]+x; } for(int i=0; i<=n; i++) v.push_back(s[i]); sort(v.begin(),v.end()); v.resize(unique(v.begin(),v.end())-v.begin()); for(int i=0; i<=n; i++) s[i] = lower_bound(v.begin(),v.end(),s[i])-v.begin()+1; ll ans = 0; for(int i=0; i<=n; i++){ ans += sum(s[i]); add(s[i]); } cout << ans << endl; return 0; }
Submission Info
Submission Time | |
---|---|
Task | E - Meaningful Mean |
User | cnxup |
Language | C++14 (GCC 5.4.1) |
Score | 600 |
Code Size | 1291 Byte |
Status | AC |
Exec Time | 50 ms |
Memory | 5104 KB |
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 600 / 600 | ||||
Status |
|
|
Set Name | Test Cases |
---|---|
Sample | a01, a02, a03 |
All | a01, a02, a03, b04, b05, b06, b07, b08, b09, b10, b11, b12, b13, b14, b15, b16, b17, b18, b19, b20, b21, b22, b23 |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
a01 | AC | 1 ms | 256 KB |
a02 | AC | 1 ms | 256 KB |
a03 | AC | 1 ms | 256 KB |
b04 | AC | 1 ms | 256 KB |
b05 | AC | 29 ms | 3956 KB |
b06 | AC | 35 ms | 5104 KB |
b07 | AC | 48 ms | 4336 KB |
b08 | AC | 48 ms | 4336 KB |
b09 | AC | 38 ms | 5104 KB |
b10 | AC | 41 ms | 5104 KB |
b11 | AC | 1 ms | 256 KB |
b12 | AC | 1 ms | 256 KB |
b13 | AC | 18 ms | 2036 KB |
b14 | AC | 49 ms | 5104 KB |
b15 | AC | 24 ms | 4336 KB |
b16 | AC | 38 ms | 5104 KB |
b17 | AC | 49 ms | 5104 KB |
b18 | AC | 50 ms | 5104 KB |
b19 | AC | 36 ms | 5104 KB |
b20 | AC | 34 ms | 3956 KB |
b21 | AC | 28 ms | 3956 KB |
b22 | AC | 49 ms | 5104 KB |
b23 | AC | 48 ms | 5104 KB |