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답안 #951148

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
951148 2024-03-21T08:57:05 Z veljko Snowball (JOI21_ho_t2) C++17
100 / 100
 918 ms 45876 KB 
/*****from dust I have come, dust I will be*****/
#include<bits/stdc++.h>
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
 
using namespace __gnu_pbds;
using namespace std;
#define int long long
#define forn(i,n) for(int i=0;i<n;i++)
int dx[8] = { 1, 0, -1, 0, -1, 1, -1, 1 };
int dy[8] = { 0, 1, 0, -1, -1, 1, 1, -1 };
int ceil_div(int a, int b) {return a % b == 0 ? a / b : a / b + 1;}
 
const int MOD = 1000000007;
//const int MOD = 998244353;
typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> pbds; // find_by_order, order_of_key
 
/*
int k = A.order_of_key(p[i].second);
A.erase(A.find_by_order(k));
erase element from pbds multiset
*/

template<class T>
struct segtree {
    vector<T> st;
    int n;
    T identity_element;
 
    segtree(int n, T identity_element) {
        this->n = n;
        this->identity_element = identity_element;
        st.assign(4 * n, identity_element);
    }
 
    T combine(T l, T r) {
        // Change this function as required.
        T ans;
        ans.maxval=max(l.maxval,r.maxval);
        ans.minval=min(l.minval,r.minval);
        return ans;
    }
 
    void buildUtil(int v, int tl, int tr, vector<T>& a) {
        if (tl == tr) {
            st[v] = a[tl];
            return;
        }
        int tm = (tl + tr) >> 1;
        buildUtil(2 * v + 1, tl, tm, a);
        buildUtil(2 * v + 2, tm + 1, tr, a);
        st[v] = combine(st[2 * v + 1], st[2 * v + 2]);
    }
 
    T queryUtil(int v, int tl, int tr, int l, int r) {
        if (l > r) return identity_element;
        if (tr < l or tl > r) {
            return identity_element;
        }
        if (l <= tl and r >= tr) {
            return st[v];
        }
        int tm = (tl + tr) >> 1;
        return combine(queryUtil(2 * v + 1, tl, tm, l, r), queryUtil(2 * v + 2, tm + 1, tr, l, r));
    }
 
    void updateUtil(int v, int tl, int tr, int pos, T upd) {
        if (tr < pos or tl > pos) return;
        if (tl == tr) {
            st[v] = upd;
            return;
        }
        int tm = (tl + tr) >> 1;
        updateUtil(2 * v + 1, tl, tm, pos, upd);
        updateUtil(2 * v + 2, tm + 1, tr, pos, upd);
        st[v] = combine(st[2 * v + 1], st[2 * v + 2]);
    }
 
    void build(vector<T> a) {
        assert((int)a.size() == n);
        buildUtil(0, 0, n - 1, a);
    }
 
    T query(int l, int r) {
        return queryUtil(0, 0, n - 1, l, r);
    }
 
    void update(int pos, T upd) {
        updateUtil(0, 0, n - 1, pos, upd);
    }
};

struct node{
    int maxval;
    int minval;
};

void solve(){
    int n, q; cin >> n>> q;
    vector<int>a(n); for (auto &t : a) cin >> t;
    vector<int>b(q); for (auto &t : b) cin >> t;
    vector<int>dif;
    forn(i,q){
        if (i == 0) dif.push_back(b[0]);
        else dif.push_back(dif.back() + b[i]);
    }
    map<int, int>mp;
    forn(i,q){
        if (mp.find(dif[i]) == mp.end()) mp[dif[i]] = i; 
    }
    vector<int>neg;
    int mn = 0;
    for (auto t : dif){
        mn = min(mn, t);
        neg.push_back(mn);
    }
    for (auto &t : neg) t *= -1;
    vector<int>pos;
    int mx = 0;
    for (auto t : dif){
        mx = max(mx, t);
        pos.push_back(mx);
    }
    // for (auto t : neg) cout <<t<<' ';
    // cout <<'\n';
    // for (auto t : dif) cout <<t<<' ';
    // cout <<'\n';

    segtree<node> st(q,{0,LONG_LONG_MAX});
    vector<node> temp;
    for(auto t : dif) temp.push_back({t,t});
    st.build(temp);

    //for (auto t : mp) cout <<t.first<<' '<<t.second<<'\n';
    vector<int>ans(n, 0);
    for (int i=0;i<n-1;i++){
        int l = 0, r = a[i+1] - a[i], x = 0, y = 0;
  
        while (l <= r){
            int mid = (l + r) / 2;
            bool ok;
            auto it = lower_bound(pos.begin(), pos.end(), mid);
            int bad = (a[i+1] - a[i]) - mid;
            if (it == pos.end()) ok = false;
            else{
                int index = it - pos.begin();
                //if (index == 2) cout <<mn<<'\n';
                int mn = neg[index];
                
                if (mn > bad) ok = false;
                else ok = true;
            }
            if (ok){
                l = mid + 1;
                x = mid;
            }
            else r = mid - 1;
        }
        
        ans[i] += x;
    }
    ans[n-1] += max(*max_element(dif.begin(), dif.end()), 0ll);
    for (int i=1;i<n;i++){
        int l = 0, r = a[i] - a[i-1], x = 0;
        while (l <= r){
            int mid = (l + r) / 2;
            int bad = (a[i] - a[i-1]) - mid;
            bool ok;
            auto it = lower_bound(neg.begin(), neg.end(), mid);
            if (it == neg.end()) ok = false;
            else{
                int index = it - neg.begin();
               // if (mid == 2) cout <<index<<'\n';
                int mx = pos[index];
                if (mx > bad) ok = false;
                else ok = true;
            }

            if (ok){
                l = mid + 1;
                x = mid;
            }
            else r = mid - 1;
        }
        //cout <<x<<'\n';
        ans[i] += x;
    }
    ans[0] += max(0ll, *min_element(dif.begin(), dif.end()) * - 1);
    for (auto t : ans) cout <<t<<'\n';
}
 
 
int32_t main(){
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    int t = 1; //cin >>t;
    for (int i=1;i<=t;i++){
        solve();
    }
    return 0;
}

Compilation message

Main.cpp: In function 'void solve()':
Main.cpp:137:46: warning: unused variable 'y' [-Wunused-variable]
  137 |         int l = 0, r = a[i+1] - a[i], x = 0, y = 0;
      |                                              ^

Subtask #1
33.0 / 33.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 740 KB Output is correct
2 Correct 1 ms 860 KB Output is correct
3 Correct 2 ms 860 KB Output is correct
4 Correct 6 ms 860 KB Output is correct
5 Correct 5 ms 860 KB Output is correct
6 Correct 5 ms 860 KB Output is correct
7 Correct 4 ms 860 KB Output is correct
8 Correct 4 ms 860 KB Output is correct
9 Correct 4 ms 604 KB Output is correct
10 Correct 2 ms 604 KB Output is correct
11 Correct 1 ms 604 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 6 ms 884 KB Output is correct
16 Correct 5 ms 860 KB Output is correct
17 Correct 3 ms 860 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 1 ms 604 KB Output is correct

Subtask #2
67.0 / 67.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 740 KB Output is correct
2 Correct 1 ms 860 KB Output is correct
3 Correct 2 ms 860 KB Output is correct
4 Correct 6 ms 860 KB Output is correct
5 Correct 5 ms 860 KB Output is correct
6 Correct 5 ms 860 KB Output is correct
7 Correct 4 ms 860 KB Output is correct
8 Correct 4 ms 860 KB Output is correct
9 Correct 4 ms 604 KB Output is correct
10 Correct 2 ms 604 KB Output is correct
11 Correct 1 ms 604 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 6 ms 884 KB Output is correct
16 Correct 5 ms 860 KB Output is correct
17 Correct 3 ms 860 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 1 ms 604 KB Output is correct
20 Correct 69 ms 38696 KB Output is correct
21 Correct 75 ms 38124 KB Output is correct
22 Correct 67 ms 38184 KB Output is correct
23 Correct 69 ms 38100 KB Output is correct
24 Correct 149 ms 39764 KB Output is correct
25 Correct 894 ms 43776 KB Output is correct
26 Correct 896 ms 43168 KB Output is correct
27 Correct 838 ms 41976 KB Output is correct
28 Correct 823 ms 41296 KB Output is correct
29 Correct 749 ms 35920 KB Output is correct
30 Correct 391 ms 30276 KB Output is correct
31 Correct 78 ms 30048 KB Output is correct
32 Correct 61 ms 30288 KB Output is correct
33 Correct 70 ms 4952 KB Output is correct
34 Correct 839 ms 43848 KB Output is correct
35 Correct 823 ms 42520 KB Output is correct
36 Correct 918 ms 43332 KB Output is correct
37 Correct 832 ms 42064 KB Output is correct
38 Correct 835 ms 41920 KB Output is correct
39 Correct 828 ms 42324 KB Output is correct
40 Correct 271 ms 42820 KB Output is correct
41 Correct 89 ms 40672 KB Output is correct
42 Correct 154 ms 30292 KB Output is correct
43 Correct 227 ms 45876 KB Output is correct
44 Correct 81 ms 41300 KB Output is correct
45 Correct 439 ms 42056 KB Output is correct
46 Correct 252 ms 45076 KB Output is correct
47 Correct 188 ms 36728 KB Output is correct
48 Correct 239 ms 45356 KB Output is correct