Why i am getting run time error

help
1 
#include <iostream>
#include<bits/stdc++.h>
#define ll long long int
#define mod 1000000007
using namespace std;
int main() {
    cin.tie(0)->sync_with_stdio(false);
	int t;cin>>t;
	while(t--){
	    int n,k;cin>>n>>k;
	    vector<vector<pair<int, int>>> cus(k);
	    for(int i=0;i<n;i++){
	        int x,y,z;
	        cin>>x>>y>>z;
	        cus[z-1].push_back({x,y});
	    }
	    int ans=0;
	    for(int i=0;i<k;i++){
	        if(cus[i].size()==0)continue;
	        sort(cus[i].begin(),cus[i].end());
	        int maxi=0;
	        for(int j=0;j<cus[i].size(); j++){
	            if(cus[i][j].first>=maxi){
	                ans++;maxi=cus[i][j].second;
	            }
	            else if(maxi>cus[i][j].second)maxi=cus[i][j].second;
	        }
	    }
	    cout<<ans<<endl;
	}
	cerr << "Time : " << 1000 * ((double)clock()) / CLOCKS_PER_SEC << "ms" << endl;
	return 0;
}
2

@vanshwari
k is uptill 10^9 so u can’t use that much size to create vector.

3

ok thanks