제출 #990020

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
990020		Has2008	Poklon (COCI17_poklon)	C++17	0 / 140	5074 ms	25476 KiB

poklon

#include "bits/stdc++.h"
using namespace std;

#define int long long
#define mod 1000000007

const int maxn = 500005;

int n, q, N = 1;
int arr[maxn], tree[maxn * 4];

int query(int n, int ql, int qr, int l, int r)
{
    if(l >= ql && r <= qr) return tree[n];
    if(l > qr || r < ql) return 0;

    int md = (l + r) / 2;
    return query(n * 2, ql, qr, l, md) + query(n * 2 + 1, ql, qr, md + 1, r);
}

int update(int u, int v)
{
    u += N;
    tree[u] = v;

    u /= 2;
    while (u > 0)
    {
        tree[u] = tree[u * 2] + tree[u * 2 + 1];
        u /= 2;
    }
}

signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);

    cin >> n >> q;

    while (N < n) N *= 2;

    for(int i = 0; i < n; i++) cin >> arr[i];

    vector < pair < int, int >> v, o;
    while (q--)
    {
        int l, r;
        cin >> l >> r;

        v.push_back({r, l});
        o.push_back({l, r});
    }
    sort(v.begin(), v.end());

    map < int, vector < int >> mp;
    map < pair < int, int >, int > ans;

    int indx = 0;
    for(int i = 0; i < n; i++)
    {
        vector < int > vv = mp[arr[i]];

        if(vv.size() == 0) mp[arr[i]].push_back(i);
        else if(vv.size() == 1)
        {
            update(vv[0], 1);

            mp[arr[i]].push_back(i);
        }
        else if(vv.size() == 2)
        {
            update(vv[0], -1);
            update(vv[1], 1);

            mp[arr[i]].push_back(i);
        }
        else
        {
            update(vv[0], 0);
            update(vv[1], -1);
            update(vv[2], 1);

            mp[arr[i]].clear();
            mp[arr[i]].push_back(vv[1]);
            mp[arr[i]].push_back(vv[2]);
            mp[arr[i]].push_back(i);
        }
        while (indx != q && v[indx].first == i + 1)
        {
            ans[{v[indx].second, v[indx].first}] = query(1, v[indx].second - 1, v[indx].first - 1, 0, N - 1);
            indx++;
        }
    }
    for(int i = 0; i < o.size(); i++) cout << ans[{o[i].first, o[i].second}] << endl;
}

컴파일 시 표준 에러 (stderr) 메시지

poklon.cpp: In function 'long long int update(long long int, long long int)':
poklon.cpp:32:1: warning: no return statement in function returning non-void [-Wreturn-type]
   32 | }
      | ^
poklon.cpp: In function 'int main()':
poklon.cpp:96:22: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   96 |     for(int i = 0; i < o.size(); i++) cout << ans[{o[i].first, o[i].second}] << endl;
      |                    ~~^~~~~~~~~~

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