Submission #951136

#	Time	Username	Problem	Language	Result	Execution time	Memory
951136		veljko	Snowball (JOI21_ho_t2)	C++17	33 / 100	2554 ms	18032 KiB

Main

/*****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
*/


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]);
    }
    // for (auto t : dif) cout <<t<<' ';
    // cout <<'\n';

    
    map<int, int>mp;
    forn(i,q){
        if (mp.find(dif[i]) == mp.end()) mp[dif[i]] = i;
    }

    //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 = false;
            int bad = (a[i+1] - a[i]) - mid;
            for (auto t : dif){
                if (t >= mid){
                    ok = true;
                    break;
                }
                if (-t > bad){
                    ok = false;
                    break;
                }
            }
            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;
            //cout <<bad<<'\n';
            bool ok = false;
            for (auto t : dif){
                if (-t >= mid){
                    ok = true;
                    break;
                }
                if (t > bad){
                    ok = false;
                    break;
                }
            }
            if (ok){
                l = mid + 1;
                x = mid;
            }
            else r = mid - 1;
        }
        
        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 (stderr)

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

• Subtask 1: 33 / 33
• Subtask 2: 0 / 67