Submission #1198988

#	Time	Username	Problem	Language	Result	Execution time	Memory
1198988		zyadhany	Sails (IOI07_sails)	C++20	100 / 100	144 ms	10056 KiB

sails

#define _CRT_SECURE_NO_WARNINGS
#include <bits/stdc++.h>
#include <unordered_map>
#include <unordered_set>
 
#define ll long long
#define ld long double
#define pl pair<ll, ll>
#define vi vector<long long>
#define vii vector<vi>
#define vc vector<char>
#define vcc vector<vc>
#define vp vector<pl>
#define mi map<ll,ll>
#define mc map<char,int>
#define sortx(X) sort(X.begin(),X.end());
#define all(X) X.begin(),X.end()
#define allr(X) X.rbegin(),X.rend()
#define ln '\n'
#define YES {cout << "YES\n"; return;}
#define NO {cout << "NO\n"; return;}
#define MUN {cout << "-1\n"; return;}
using namespace std;
 
const int MODE = 1e9+7;


typedef long long item;
class SegmentTree
{
public:
    void set(int l, int r, int value) {
        set(0, 0, size - 1, l, r, value);
    }

    item getrange(int l, int r) {
        return (getrange(0, 0, size - 1, l, r));
    }
    item get(ll k) {
        return (get(0, 0, size - 1, k));
    }

    void build(int n) {
        size = 1;
        while (size < n)
            size *= 2;
        tree.assign(size * 2, item());
        lazy.assign(size * 2, 0);
    }
private:
    int size;
    vector<item> tree;
    vector<long long> lazy;

    item merge(item &a, item &b) {
        item res = min(a, b);
        return (res);
    }

    void checkLazy(int m, int lx, int rx) {
        if (!lazy[m]) return;
        tree[m] += lazy[m];
        
        if (lx != rx) {
            lazy[2 * m + 1] += lazy[m];
            lazy[2 * m + 2] += lazy[m];
        }

        lazy[m] = 0;
    }

    void set(int m, int lx, int rx, int l, int r, int val) {
        checkLazy(m, lx, rx);
        if (rx < l || r < lx) return;
        if (l <= lx && rx <= r)
        {
            lazy[m] = val;
            checkLazy(m, lx, rx);
            return;
        }

        int mid = (lx + rx) / 2;
        item s1, s2;

        set(m * 2 + 1, lx, mid, l, r, val);
        set(m * 2 + 2, mid + 1, rx, l, r, val);
        s1 = tree[m * 2 + 1], s2 = tree[m * 2 + 2];

        tree[m] = merge(s1, s2);
    }

    item getrange(int m, int lx, int rx, int l, int r) {
        checkLazy(m, lx, rx);
        if (rx < l || r < lx) return INT32_MAX;
        if (l <= lx && rx <= r) return (tree[m]);

        int mid = (lx + rx) / 2;
        item s1, s2;

        s1 = getrange(m * 2 + 1, lx, mid, l, r);
        s2 = getrange(m * 2 + 2, mid + 1, rx, l, r);

        return merge(s1, s2);
    }

    item get(int m, int lx, int rx, int k) {
        checkLazy(m, lx, rx);
        if (tree[m] > k) return -1;
        if (lx == rx) return lx;

        int mid = (lx + rx) / 2;
        item s1, s2;
        s1 = get(m * 2 + 1, lx, mid, k);
        if (s1 != -1) return s1;
        return get(m * 2 + 2, mid + 1, rx, k);
    }

};


void solve(int tc) {
    ll n;

    cin >> n;

    vp X(n);
    for (int i = 0; i < n; i++)
    {
        cin >> X[i].first >> X[i].second;
    }
    sortx(X);    

    ll at = 1;
    SegmentTree sg;
    sg.build(2e5);

    for (auto [a, b] : X) {
        a--;
        ll v = sg.getrange(a-b+1, a-b+1);
        ll p = sg.get(v);
        ll p1 = sg.get(v-1);
        if (p1 <= a && p1 != -1) {
            sg.set(p1, a, 1);
            b-=a-p1+1;
        }
        sg.set(p, p+b-1, 1);
    }

    ll sol = 0;
    for (int i = 0; i < 2e5; i++)
    {
        ll re = sg.getrange(i, i)-1;
        sol += re * (re + 1) / 2;
    }
    cout << sol << '\n';
}
 
signed main()
{
    ios_base::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr);
    int size = 1;    
 
    // freopen("slingshot.in", "r", stdin);
    // freopen("slingshot.out", "w", stdout);
 
    // cin >> size;
    for (int i = 1; i <= size; i++) solve(i);
    return 0;
}

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 5 / 5
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10
• Subtask 11: 10 / 10