Submission #762660

#	Time	Username	Problem	Language	Result	Execution time	Memory
762660		Charizard2021	Snowball (JOI21_ho_t2)	C++17	100 / 100	82 ms	15332 KiB

Main

#include<bits/stdc++.h>
using namespace std;
#define IOS ios::sync_with_stdio(false);; cin.tie(NULL)
void selfMax(long long& a, long long b){
    a = max(a, b);
}
void selfMin(long long& a, long long b){
    a = min(a, b);
}
template<typename T> istream& operator>>(istream& in, vector<T>& a) {for(auto &x : a) in >> x; return in;};
template<typename T1, typename T2> istream& operator>>(istream& in, pair<T1, T2>& x) {return in >> x.first >> x.second;}

template<typename T1, typename T2> ostream& operator<<(ostream& out, const pair<T1, T2>& x) {return out << x.first << ' ' << x.second;}
template<typename T> ostream& operator<<(ostream& out, vector<T>& a) {for(auto &x : a) out << x << ' '; return out;};
template<typename T> ostream& operator<<(ostream& out, vector<vector<T> >& a) {for(auto &x : a) out << x << '\n'; return out;};
template<typename T1, typename T2> ostream& operator<<(ostream& out, vector<pair<T1, T2> >& a) {for(auto &x : a) out << x << '\n'; return out;};

/*

Use DSU dsu(N);

*/
struct DSU {
	vector<long long> e;
	DSU(long long N) { e = vector<long long>(N, -1); }

	// get representive component (uses path compression)
	long long get(long long x) { return e[x] < 0 ? x : e[x] = get(e[x]); }

	bool same_set(long long a, long long b) { return get(a) == get(b); }

	long long size(long long x) { return -e[get(x)]; }

	bool unite(long long x, long long y) {  // union by size
		x = get(x), y = get(y);
		if (x == y) return false;
		if (e[x] > e[y]) swap(x, y);
		e[x] += e[y]; e[y] = x;
		return true;
	}
};
/*

Run with Bit<long long> BIT

*/
template <class T> class BIT {
    private:
        long long size;
        vector<T> bit;
        vector<T> arr;
    public:
        BIT(long long size) : size(size), bit(size + 1), arr(size) {}
        void set(long long ind, long long val) { add(ind, val - arr[ind]); }
        void add(long long ind, long long val) {
            arr[ind] += val;
            ind++;
            for (; ind <= size; ind += ind & -ind) { bit[ind] += val; }
        }
        T pref_sum(long long ind) {
            ind++;
            T total = 0;
            for (; ind > 0; ind -= ind & -ind) { total += bit[ind]; }
            return total;
        }
};
/*

Change Comb for specific Seg tree probs, but run with Seg<long long> Seg;

*/
template<class T> struct Seg {
	const T ID = 1e18; T comb(T a, T b) { return min(a,b); }
	long long n; vector<T> seg;
	void init(long long _n) { n = _n; seg.assign(2*n,ID); }
	void pull(long long p) { seg[p] = comb(seg[2*p],seg[2*p+1]); }
	void upd(long long p, T val) {
		seg[p += n] = val; for (p /= 2; p; p /= 2) pull(p); }
	T query(long long l, long long r) {
		T ra = ID, rb = ID;
		for (l += n, r += n+1; l < r; l /= 2, r /= 2) {
			if (l&1) ra = comb(ra,seg[l++]);
			if (r&1) rb = comb(seg[--r],rb);
		}
		return comb(ra,rb);
	}
};
int main() {
    IOS;
	long long n, q;
	cin >> n >> q;
    vector<long long> v(n + 1);
    for(long long i = 1; i < n + 1; i++){
        cin >> v[i];
    }
    vector<long long> queries(q + 1);
    for(long long i = 1; i < q + 1; i++){
        cin >> queries[i];
    }
    vector<long long> left(q + 1);
    vector<long long> right(q + 1);
    long long sum = 0;
    left[0] = 0;
    right[0] = 0;
    for(long long i = 1; i <= q; i++){
        sum += queries[i];
        right[i] = max(right[i - 1], -sum);
        left[i] = max(left[i - 1], sum);
    }
    vector<long long> answers(1 + n);
    answers[1] = right[q];
    answers[n] = left[q];
    for(long long i = 1; i < n; i++){
        long long difference = v[i + 1] - v[i];
        long long low = 0;
        long long high = q;
        while(low <= high){
            long long mid = (low + high)/2;
            if(left[mid] + right[mid] >= difference){
                high = mid - 1;
            }
            else{
                low = mid + 1;
            }
        }
        answers[i] += left[high];
        answers[i + 1] += right[high];
        long long remaining = difference - left[high] - right[high];
        if(high < q){
            if(left[high + 1] > left[high]){
                answers[i] += remaining;
            }
            else{
                answers[i + 1] += remaining;
            }
        }
    }
    for(long long i = 1; i <= n; i++){
        cout << answers[i] << "\n";
    }
}

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