Submission #696713

#	Time	Username	Problem	Language	Result	Execution time	Memory
696713		socpite	Izbori (COCI22_izbori)	C++14	110 / 110	689 ms	94176 KiB

Main

#include<bits/stdc++.h>
using namespace std;
 
#define f first
#define s second
 
typedef long long ll;
typedef long double ld;
 
const int maxn = 4e5+5;
const int zr = 2e5+3;
const ll inf = 1e18+5;
 
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

ll s1[4*maxn], s2[4*maxn], sumid[4*maxn];
int lz[4*maxn], A[maxn];
pair<int, int> vec[maxn];
vector<int> pos[maxn];
int n;
 
vector<int> nd;
 
void build(int l = 1, int r = maxn-1, int id = 1){
    if(l == r)sumid[id] = maxn - l;
    else{
        int mid = (l+r)>>1;
        build(l, mid, id<<1);
        build(mid+1, r, id<<1|1);
        sumid[id] = sumid[id<<1] + sumid[id<<1|1];
    } 
}
 
void push(int l, int r, int id){
    nd.push_back(id);
    if(!lz[id])return;
    s1[id]+=1LL*lz[id]*(r-l+1);
    s2[id]+=1LL*lz[id]*sumid[id];
    if(l < r){
        lz[id<<1]+=lz[id];
        nd.push_back(id<<1);
        nd.push_back(id<<1|1);
        lz[id<<1|1]+=lz[id];
    }
    lz[id] = 0;
}
 
void add(int l, int r, int ql, int qr, int id){
    push(l, r, id);
    if(qr < l || r < ql)return;
    if(ql <= l && r <= qr){
        lz[id]++;
        push(l, r, id);
    }
    else{
        int mid = (l+r)>>1;
        add(l, mid, ql, qr, id<<1);
        add(mid+1, r, ql, qr, id<<1|1);
        s1[id]= s1[id<<1] + s1[id<<1|1];
        s2[id] = s2[id<<1] + s2[id<<1|1];
 
    }
}
 
ll q2(int l, int r, int ql, int qr, int id){
    push(l, r, id);
    if(qr < l || r < ql)return 0;
    if(ql <= l && r <= qr)return s2[id] - s1[id]*(maxn-qr-1);
    else{
        int mid = (l+r)>>1;
        return q2(l, mid, ql, qr, id<<1) + q2(mid+1, r, ql, qr, id<<1|1);
    }
}
 
ll q1(int l, int r, int ql, int qr, int id){
    push(l, r, id);
    if(qr < l || r < ql)return 0;
    if(ql <= l && r <= qr)return s1[id];
    else{
        int mid = (l+r)>>1;
        return q1(l, mid, ql, qr, id<<1) + q1(mid+1, r, ql, qr, id<<1|1);
    }
}
 
int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    cin >> n;
    for(int i = 1; i <= n; i++){
        vec[i].f = rng()%2+1;
        cin >> vec[i].f;
        A[i] = vec[i].f;
        vec[i].s = i;
    }
    cout << "\n";
    int crr = 1;
    sort(vec+1, vec+n+1);
    pos[1].push_back(vec[1].s);
    for(int i = 2; i <= n; i++){
        if(vec[i].f != vec[i-1].f)crr++;
        pos[crr].push_back(vec[i].s);
    }
    ll ans = 0;
    build();
    for(int i = 1; i <= n; i++){
        if(pos[i].empty())break;
        int crr = zr;
        add(1, maxn-1, crr, crr, 1);
        if(pos[i][0] > 1){
            add(1, maxn-1, crr-pos[i][0]+1, crr-1, 1);
            //cout << crr-pos[i][0]+1 << " " << crr-1 << "\n";
            crr-=pos[i][0]-1;
        }
        crr++;
        add(1, maxn-1, crr, crr, 1);
        ans += q1(1, maxn-1, 1, crr-1, 1);
        for(int j = 1; j < pos[i].size(); j++){
            int d= pos[i][j] - pos[i][j-1]-1;
            if(d){
                ans += q2(1, maxn-1, crr-d-1, crr-2, 1);
                ans += q1(1, maxn-1, 1, crr-d-2, 1)*d; 
                add(1, maxn-1, crr-d, crr-1, 1);
                crr-=d;
            }
            //cout << crr << "\n";
            ans += q1(1, maxn-1, 1, crr, 1);
            crr++;
            add(1, maxn-1, crr, crr, 1);
        }
        if(pos[i].back() < n){
            int d = n - pos[i].back();
            ans += q2(1, maxn-1, crr-d-1, crr-2, 1);
            ans += q1(1, maxn-1, 1, crr-d-2, 1)*d;
        }
        for(auto v: nd){
            s1[v] = 0;
            s2[v] = 0;
            lz[v] = 0;
        }
        nd.clear();
        //ans = 0;
        //cout << ans << "\n";
    }
    cout << ans;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:117:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  117 |         for(int j = 1; j < pos[i].size(); j++){
      |                        ~~^~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 15 / 15
• Subtask 3: 15 / 15
• Subtask 4: 70 / 70