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답안 #219214

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
219214 2020-04-04T15:29:12 Z DavidDamian Vudu (COCI15_vudu) C++11
98 / 140
 827 ms 65540 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long int ll;
int bit[1000006];
int n;
void update(int i,int v)
{
    while(i<=n+5){
        bit[i]+=v;
        i+=(i&(-i));
    }
}
int query(int i)
{
    int ans=0;
    while(i>0){
        ans+=bit[i];
        i-=(i&(-i));
    }
    return ans;
}
ll getSum(int a,int b)
{
    ll ans=(ll)query(b)-(ll)query(a-1);
    return ans;
}
typedef pair<ll,int> pii;
map<ll,int> remap;
ll k;
ll A[1000006]; //S[i]-k*i
//ll S_K[1000006];
int main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);
    cin>>n;
    for(int i=1;i<=n;i++){
        cin>>A[i];
        A[i]+=A[i-1];
    }
    cin>>k;
    remap[0]=1;
    for(ll i=1;i<=n;i++){
        A[i]=A[i]-k*i; //S_K[i]=A[i]-k*i
        remap[ A[i] ]=1;
    }
    int id=1;
    for(pii p: remap){
        remap[p.first]=id++;
    }
    for(int i=0;i<=n;i++){
        A[i]=remap[ A[i] ];
    }
    remap.clear();
    ll total=0;
    for(int i=0;i<=n;i++){
        if(i>0) total+=(ll)getSum(1,A[i]);
        update(A[i],1);
    }
    cout<<total<<'\n';
    return 0;
}

Subtask #1
98.0 / 140.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 896 KB Output is correct
2 Correct 7 ms 768 KB Output is correct
3 Correct 7 ms 640 KB Output is correct
4 Runtime error 506 ms 65540 KB Execution killed with signal 9 (could be triggered by violating memory limits)
5 Correct 487 ms 40952 KB Output is correct
6 Correct 827 ms 65536 KB Output is correct
7 Runtime error 779 ms 65536 KB Execution killed with signal 9 (could be triggered by violating memory limits)
8 Correct 735 ms 57776 KB Output is correct
9 Runtime error 419 ms 65540 KB Execution killed with signal 9 (could be triggered by violating memory limits)
10 Correct 790 ms 65536 KB Output is correct