Submission #2872890


Source Code Expand

#include<bits/stdc++.h>

using namespace std;

const long long maxn = 2e5+111;

long long c[maxn];
long long s[maxn];
long long lowbit(long long x)
{
    return x & -x;
}

long long sum(long long x)
{
    long long res = 0;
    while(x>0)
    {
        res += c[x];
        x -= lowbit(x);
    }
    return res;
}

void add(long long x,long long v)
{
    while(x<maxn)
    {
        c[x] += v;
        x += lowbit(x);
    }
}

int main()
{
    long long n,k;
    cin>>n>>k;
    long long x;
    vector<long long> v;
    for(long long i =1;i<=n;i++)
    {
        scanf("%d",&x);
        x -= k;
        s[i] = s[i-1] + x;
        v.push_back(s[i]);
    }
    v.push_back(s[0]);
    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;
    int ans = 0;
    for(long long i = 0;i<=n;i++)
        ans += sum(s[i]),add(s[i],1);
    cout<<ans<<endl;
}

Submission Info

Submission Time
Task E - Meaningful Mean
User vjudge1
Language C++14 (GCC 5.4.1)
Score 0
Code Size 964 Byte
Status WA
Exec Time 53 ms
Memory 5104 KB

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:42:22: warning: format ‘%d’ expects argument of type ‘int*’, but argument 2 has type ‘long long int*’ [-Wformat=]
         scanf("%d",&x);
                      ^
./Main.cpp:42:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&x);
                       ^

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 0 / 600
Status
AC × 1
WA × 2
AC × 2
WA × 21
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 WA 1 ms 256 KB
a02 AC 1 ms 256 KB
a03 WA 1 ms 256 KB
b04 AC 1 ms 256 KB
b05 WA 36 ms 3568 KB
b06 WA 50 ms 5104 KB
b07 WA 50 ms 5104 KB
b08 WA 53 ms 5104 KB
b09 WA 45 ms 5104 KB
b10 WA 47 ms 5104 KB
b11 WA 1 ms 256 KB
b12 WA 2 ms 256 KB
b13 WA 21 ms 2036 KB
b14 WA 49 ms 5104 KB
b15 WA 41 ms 5104 KB
b16 WA 49 ms 5104 KB
b17 WA 49 ms 5104 KB
b18 WA 49 ms 5104 KB
b19 WA 50 ms 5104 KB
b20 WA 50 ms 5104 KB
b21 WA 43 ms 5104 KB
b22 WA 50 ms 5104 KB
b23 WA 49 ms 5104 KB