Submission #410251

#	Time	Username	Problem	Language	Result	Execution time	Memory
410251		yoavL	Bridges (APIO19_bridges)	C++14	16 / 100	503 ms	4664 KiB

bridges

#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <set>
#include <unordered_set>
#include <map>
#include <unordered_map>
#include <queue>
#include <stack>
#include <bitset>
#include <math.h>
#include <fstream>
#include <iomanip>


using namespace std;

using ll = long long;
using ld = long double;
using vll = vector<ll>;
using vvll = vector<vll>;
using vvvll = vector<vvll>;
using vvvvll = vector<vvvll>;
using vb = vector<bool>;
using vvb = vector<vb>;
using vvvb = vector<vvb>;
using vld = vector<ld>;
using vvld = vector<vld>;
using vstr = vector<string>;
using pll = pair<ll, ll>;
using vpll = vector<pll>;
using vvpll = vector<vpll>;
using pb = pair<bool, bool>;
using vpb = vector<pb>;
using vvpb = vector<vpb>;
using vi = vector<int>;
using vvi = vector<vi>;

const ll mod = (ll)1e9 + 7;
const ll inf = (ll)1e18;


#define FAST        ios_base::sync_with_stdio(0)
#define FASTIN		cin.tie(0)
#define FASTOUT		cout.tie(0)

#define upmin(a, b) a = min(a, b)
#define upmax(a, b) a = max(a, b)

#define pr(x) cout << x << endl;
#define prv(v) cout << #v << ": "; for(auto it = v.begin(); it != v.end(); ++it) cout << *it << " "; cout << endl;
#define prvv(v) for(auto it : v) { for(auto it2 : it) cout << it2 << " "; cout << endl; } cout << endl;
#define wpr(x) cout << #x << " = " << (x) << endl;
#define wprv(v) cout << #v << ": " << endl; for(auto it : v) cout << *it << " "; cout << endl;
#define wprvv(v) cout << #v << ": " << endl; for(auto it : v) { for(auto it2 : it) cout << it2 << " "; cout << endl; } cout << endl;


#define rep(i,s,e) for(ll i = s; i < e; i++)
#define all(x) x.begin(),x.end()
#define pb push_back


ll n, m, q;
vll arr;


struct SEG {
	vll a;
	ll sz;
	const ll bval = 1e18; //

	ll f(ll a, ll b) //
	{
		return min(a, b);
	}

	SEG() {}

	SEG(ll n) {
		for (sz = 1; sz < n; sz <<= 1);
		a.resize(2 * sz, bval);
	}
	void make(ll n)
	{
		for (sz = 1; sz < n; sz <<= 1);
		a.resize(2 * sz, bval);
	}

	void up(ll ind, ll nval) {
		ind += sz;
		a[ind] = nval;
		for (ind >>= 1; ind; ind >>= 1) a[ind] = f(a[ind * 2], a[ind * 2 + 1]);
	}

	ll query(ll l, ll r) {
		l += sz, r += sz;
		ll res = bval;
		while (l <= r) {
			if (l % 2 == 1) res = f(res, a[l++]);
			if (r % 2 == 0) res = f(res, a[r--]);
			l >>= 1, r >>= 1;
		}
		return res;
	}


};



void solve()
{
	cin >> n >> m;
	arr.resize(n-1);
	rep(i, 0, m) {
		ll xt, yt, dt;
		cin >> xt >> yt >> dt;
		arr[i] = dt;
	}

	SEG seg;
	seg.make(n-1);
	rep(i, 0, n-1) {
		seg.up(i, arr[i]);
	}

	cin >> q;
	while (q--) {
		ll type;
		cin >> type;
		if (type == 1) {
			ll i, v;
			cin >> i >> v;
			i--;
			seg.up(i, v);
		}
		else {
			ll w, s;
			cin >> s >> w;
			s--;
			ll ans = 1;
			{
				ll low = 0, high = s-1, mid;
				ll res = s;
				while (low <= high) {
					mid = (low + high) / 2;
					ll v = seg.query(mid, s-1);
					if (w <= v) { // ok
						upmin(res, mid);
						high = mid - 1;
					}
					else {
						low = mid + 1;
					}
				}
				ans += s - res;
				//wpr(res);
			}
			{
				ll low = s, high = n-2, mid;
				ll res = s;
				while (low <= high) {
					mid = (low + high) / 2;
					//wpr(mid);
					ll v = seg.query(s, mid);
					//wpr(v);
					if (w <= v) { // ok
						upmax(res, mid+1);
						low = mid + 1;
						
					}
					else {
						high = mid - 1;
					}
				}
				ans += res - s;
				//wpr(res);
			}
			pr(ans);
		}
	}
}

int main()
{
	FAST;
	FASTIN; FASTOUT;
	solve();
}


/*

5 4
1 2 1
2 3 2
3 4 3
4 5 4
100
2 3 2

*/

• Subtask 1: 0 / 13
• Subtask 2: 16 / 16
• Subtask 3: 0 / 17
• Subtask 4: 0 / 14
• Subtask 5: 0 / 13
• Subtask 6: 0 / 27