Submission #238283

#	Time	Username	Problem	Language	Result	Execution time	Memory
238283		Pbezz	Lasers (NOI19_lasers)	C++14	24 / 100	444 ms	33400 KiB

lasers

#include <bits/stdc++.h>
using namespace std;

#define loop(i,n) for (ll i = 0; i < n; i++)

#define ll long long
#define INF 1e9+5
#define MAXN 300007
#define pb push_back 
#define mp make_pair
typedef pair<ll,ll> pii;


int main(){

	ll l,r,k,x,maxi=0;
	cin>>l>>r;

	vector<vector<ll>>row(r);

	loop(i,r){

	cin>>x;
	maxi=max(maxi,x);

	loop(j,x){
	cin>>k;
	row[i].pb(k);
	}

}

	if(maxi==1){//só há um por linha

	ll savedL=INF, savedR=-1;

	loop(i,r){

	k=row[i][0];

	savedR = max(savedR , k);

	savedL = min(savedL, l-k-1);

}

	k = savedL+1;

	savedR=max(savedR,savedL+1);
	k+=(l-savedR);
	printf("%lld\n",l-k);


	}else{








}
return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 14 / 14
• Subtask 3: 0 / 20
• Subtask 4: 0 / 21
• Subtask 5: 0 / 22
• Subtask 6: 0 / 13