Submission #1098315

#	Time	Username	Problem	Language	Result	Execution time	Memory
1098315		vjudge1	Bridges (APIO19_bridges)	C++17	16 / 100	534 ms	17664 KiB

bridges

//UNSTOPPABLE
#include "bits/stdc++.h"
#include <ext/pb_ds/assoc_container.hpp>
#define ll long long
#define pb push_back
#define pf push_front
#define ppb pop_back
#define ppf pop_front
#define int long long
#define F first
#define S second
#define all(x) (x).begin(), (x).end()
#define pii pair<int,int>
#define sigma signed
#define tpii pair <pair <int,int> , int>
#define bruh cout << "NO\n"
using namespace std;
using namespace __gnu_pbds;
const int N = 3e5 + 5;
int mod = 1e9 + 7;
const int INF = 1e18;
int n,m,q,t[4 * N];
vector <pii> g[N];
void upd(int pos , int x , int v = 1 , int tl = 1 , int tr = n){
	if(tl > pos || tr < pos) return;
	if(tl == pos && tr == pos){
		t[v] = x;
		return;
	}
	int tm = tl + tr >> 1;
	upd(pos , x , v * 2 , tl , tm);
	upd(pos , x , v * 2 + 1 , tm + 1 , tr);
	t[v] = min(t[v * 2] , t[v * 2 + 1]);
} 
int get(int l , int r , int v = 1 , int tl = 1 , int tr = n){
	if(tl > r || tr < l) return INF;
	if(tl >= l && tr <= r) return t[v];
	int tm = tl + tr >> 1;
	return min(get(l , r , v * 2 , tl , tm) , get(l , r , v * 2 + 1 , tm + 1 , tr));
}
void Goldik(){
	cin >> n >> m;
	set <int> st;
	map <int,int> mp;
	for(int i = 1 ; i <= m ; i++){
		int u,v,w;
		
		cin >> u >> v >> w;
		g[u].pb({v , w});
		g[v].pb({u , w});
		upd(u , w);
	}
	cin >> q;
	for(int i = 1 ; i <= q ; i++){
		int tp,u,v;
		cin >> tp >> u >> v;
		if(tp == 1){
			upd(u , v);
		}
		else{
			int l = 1 , r = u - 1 , res = u;
			while(l <= r){
				int md = l + r >> 1;
				if(get(md , u - 1) < v){
					l = md + 1;
				}
				else{
					res = md;
					r = md - 1;
				}
			}
			l = u + 1 , r = n ; int res1 = u;
			while(l <= r){
				int md = l + r >> 1;
				if(get(u , md - 1) < v){
					r = md - 1;
				}
				else{
					res1 = md;
					l = md + 1;
				}
			}
			cout << res1 - res + 1 << '\n';
		}
	}
}
//rewai mnogo zadach vozmozhno odna iz nih gde to popadetsya
//returning winter prime?
//chem prowe tem luchshe
sigma main(/*AZ AZDAN UZDIKSIZ*/){
	//freopen("txt.in","r",stdin);
	//freopen("txt.out","w",stdout);
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	srand(time(0));
	int TT = 1;
	// cin >> TT;
	for(int i = 1 ; i <= TT ; i++){
		//cout << "Case " << i << ": ";
		Goldik();
	}
}

Compilation message (stderr)

bridges.cpp: In function 'void upd(long long int, long long int, long long int, long long int, long long int)':
bridges.cpp:30:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   30 |  int tm = tl + tr >> 1;
      |           ~~~^~~~
bridges.cpp: In function 'long long int get(long long int, long long int, long long int, long long int, long long int)':
bridges.cpp:38:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   38 |  int tm = tl + tr >> 1;
      |           ~~~^~~~
bridges.cpp: In function 'void Goldik()':
bridges.cpp:63:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   63 |     int md = l + r >> 1;
      |              ~~^~~
bridges.cpp:74:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   74 |     int md = l + r >> 1;
      |              ~~^~~

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