Submission #98827

#	Time	Username	Problem	Language	Result	Execution time	Memory
98827		someone_aa	Vudu (COCI15_vudu)	C++17	0 / 140	1092 ms	66560 KiB

vudu

#include <bits/stdc++.h>
#define ll long long
#define pb push_back
#define mp make_pair
#define P pair<ll, ll>
using namespace std;
const int maxn = 1000100;
const int maxm = 2 * maxn;
int tree[maxm], m;
 
void update(int x,int val) {
    while(x<=m)  {
        tree[x]+=val;  x+=(x&-x);
    }
}
 
int query(int x) {
    int res=0;
    while(x>0)  {
        res+=tree[x];  x-=(x&-x);
    }
    return res;
}
 
ll n, d, arr[maxn];
map<ll, int> ind;
set<ll>values;
 
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
 
    cin>>n;
    for(int i=1;i<=n;i++) {
        cin>>arr[i];
    }
    cin>>d;
    ll sum = 0LL;
    for(ll i=1LL;i<=n;i++) {
        ind[sum-d*i] = 1;
        sum += arr[i];
        ind[sum-d*i - d] = 1;
    }
 
    int br = 1;
    for(auto i:ind) {
        i.second = br++;
    }
    m = br;
    sum = 0LL;
    ll result = 0LL;
    for(int i=1;i<=n;i++) {
        update(ind[sum - d*i], 1);
        //cout<<i<<": "<<sum-d*i<<", "<<ind[sum-d*i]<<" -> ";
        sum += arr[i];
        result += 1LL * query(ind[sum - d*i - d]);
        //cout<<sum - d*i - d<<", "<<ind[sum-d*i-d]<<"\n";
    }
    cout<<result<<"\n";
    return 0;
}

Compilation message (stderr)

vudu.cpp: In function 'int main()':
vudu.cpp:46:14: warning: variable 'i' set but not used [-Wunused-but-set-variable]
     for(auto i:ind) {
              ^

• Subtask 1: 0 / 140