CNOTE - Editorial

thanks for the message this helped me a lot,kudos!

Following is my CPP code. what am I doing wrong?
Not even first subtask is correct.

#include <iostream>
using namespace std;

int main() {
	int t, x, y, k, n, pi, ci;
	bool found;
	cin >> t;
	while(t--){
	    cin >> x >> y >> k >> n;
	    found = (y >= x) ? true: false;  // current book is enough.
	    while((n--) && (!found)){
	        cin >> pi >> ci;
	        if((ci <= k) && (pi >= (x - y))){
	            found = true;
	        }
	    }
	    if(found)
	        cout << "LuckyChef" << endl;
	    else 
	        cout << "UnluckyChef" << endl;
	}
	return 0;
}
#include <iostream>
using namespace std;

int main() {
	int t, x, y, k, n, pi, ci;
	bool found;
	cin >> t;
	while(t--){
	    cin >> x >> y >> k >> n;
	    found = (y >= x) ? true: false;  // current book is enough.
	    while((n--) && (!found)){
	        cin >> pi >> ci;
	        if((ci <= k) && (pi >= (x - y))){
	            found = true;
	        }
	    }
	    if(found)
	        cout << "LuckyChef" << endl;
	    else 
	        cout << "UnluckyChef" << endl;
	}
	return 0;
}
#include <iostream>
using namespace std;
int main() {
	 int T;
	cin>>T;
	for(int i = 0; i < T; i++){
	    int X,Y,K,N;
 	    cin >> X >> Y >> K >> N;
        bool luck = false;
        for(int j =0; j < K;j++){
           int p,q;
            cin>>p>>q;
            if(q <= K & p >= (X-Y)){
                luck = true;
            }
         }
        if(!luck){
             cout<<"UnluckyChef"<<' ';
        }else{
             cout<<"LuckyChef"<<' ';
        }
    }
    return 0;
  }

i cant understand whats wrong with this code.

1 Like

#include <stdio.h>
int main(void) {
// your code goes here
int i,j,k,l;
int nooftestcases;
scanf("%d",&nooftestcases);
for(i=0;i<nooftestcases;i++){
int storypages,existingpages,pagesrequired,moneyleft,noofbooks;
scanf("%d",&storypages);
scanf("%d",&existingpages);
//printf("%d\n",pagesrequired);
scanf("%d",&moneyleft);
scanf("%d",&noofbooks);
//pagesrequired = storypages - existingpages;
//printf("%d\t%d",moneyleft,noofbooks);
for(j=0;j<noofbooks;j++){
int bookpages,cost;
scanf("%d",&bookpages);
scanf("%d",&cost);
if(bookpages>=storypages - existingpages && moneyleft>=cost){
printf(“LuckyChef\n”);
break;
}
bookpages;cost;
}
if(j==noofbooks){
printf(“UnluckyChef\n”);
}
}
return 0;
}

can someone pls look into the code and tell what’s wrong

#include <iostream>

using namespace std;

int main(int argc, char *arg[]) {
    long int T, X, Y, K, N;

    cin >> T;
    long int t = 0, n, pi, ci, req_pages;
    bool found;

    while (t < T) {
        cin >> X >> Y >> K >> N;

        req_pages = X-Y;
        n = 0;
        found = false;
        while (n < N) {
            cin >> pi >> ci;
            if ((req_pages <= pi) && (ci <= K)) {
                found = true;
                break;
            }
            ++n;
        }

        cout << (found ? "LuckyChef" : "UnluckyChef") << '\n';
        ++t;
    }

    return 0;

}

I don’t see anything wrong with the program and yet I’m unable to get the right …

Consider the testcase:

2
2 1 5 2
1 1
100 5
2 1 1 1
1 1
2 Likes
]$ ./test < input.txt
LuckyChef
UnluckyChef


#include <iostream>

using namespace std;

int main(int argc, char *arg[]) {
    size_t T, X, Y, K, N, t, n, pi, ci, req_pages;
    bool found;

    t = 0;
    cin >> T;
    while (t < T) {
        cin >> X >> Y >> K >> N;

        req_pages = X-Y;
        n = 0;
        found = false;
        while (n < N) {
            cin >> pi >> ci;
            if ((req_pages <= pi) && (ci <= K)) {
                found = true;
                break;
            }
            ++n;
        }

        cout << (found ? "LuckyChef" : "UnluckyChef") << endl;
        ++t;
    }

    return 0;

}
1 Like

Yep - is that the correct answer?

But I can’t pass any Codechef tests :slight_smile:

You didn’t answer my question :slight_smile:

Edit:

To be more explicit:

What is the answer to

1
2 1 5 2
1 1
100 5

?

What is the answer to

1
2 1 1 1
1 1

?

So what should the answer be for

2
2 1 5 2
1 1
100 5
2 1 1 1
1 1

?

1 Like

Correct Answer should be

LuckyChef
LuckyChef

right ?

but my answer is

LuckyChef
UnluckyChef

Am I right ?

1 Like

Yep - so now you have a nice, 100% reproducible testcase, lovingly handcrafted to highlight the flaw in your code - get debugging :slight_smile:

Two months late, but yours fails on the same testcase as @onkag2, and for the same reason :slight_smile:

#include <iostream>

using namespace std;

int main(int argc, char *arg[]) {
    size_t T, X, Y, K, N, t, n, pi, ci, req_pages;
    bool found;

    t = 0;
    cin >> T;
    while (t < T) {
        cin >> X >> Y >> K >> N;

        req_pages = X-Y;
        n = 0;
        found = false;
        while (n < N) {
            cin >> pi >> ci;
            if ((req_pages <= pi) && (ci <= K))
                found = true;
            ++n;
        }

        cout << (found ? "LuckyChef" : "UnluckyChef") << endl;
        ++t;
    }

    return 0;

}

Simple mistake while reading the inputs, but spent a whole day debugging … finally debugged it using cout to print ci, pi, req_pages.

All tests passed …

Fix was to allow inner while loop to complete before re-reading the next test case … X, Y, K, N …

1 Like

Where Mycode going wrong it is showing WA as well as TLE.
here is my code:

#include <bits/stdc++.h>
using namespace std;
int main() {
int t;
int x,y,n,k,ans=0;
cin>>t;
while(t–){
ans=0;
cin>>x>>y>>n>>k;
int page[n],cost[n];
//cout<<n<<endl;
for(int i=0;i<n;i++){
cin>>page[i]>>cost[i];
}
for(int i=0;i<n;i++){
if((page[i]>=(x-y))&&(cost[i]<=k)){
ans=1;
break;
}
}
if(ans==1)
cout<<“LuckyChef”<<endl;
else
cout<<“UnluckyChef”<<endl;
}
return 0;
}

You’re reading the input in the wrong order: look at the Input section of the Problem statement more carefully :slight_smile:

1 Like

T=int(input())
for i in range(T):
X,Y,K,N=map(int,input().split())
p=[]
c=[]
flag=1
for j in range(N):

           p,c=map(int,input().split())
           if(c<=K and p+Y>=X):
                   flag=0
    if(flag==0):
            print('LuckyChef')
    else:
            print('UnluckyChef')
	public static void main (String[] args) throws java.lang.Exception
	{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int t = Integer.parseInt(br.readLine());

		String mainInput[];
		int no_of_pages_required;
		int no_of_pages_left;
		int money;
		int no_of_notebooks;

		String notebook_details[];
		int pages;
		int price;
		boolean flag;
		for(int i = 0; i<t; i++) {

			flag = true;
			//assignment of inputs
			mainInput = br.readLine().split("\\s+");
			no_of_pages_required = Integer.parseInt(mainInput[0]);
			no_of_pages_left = Integer.parseInt(mainInput[1]);
			money = Integer.parseInt(mainInput[2]);
			no_of_notebooks = Integer.parseInt(mainInput[3]);


			for(int j = 0; j<no_of_notebooks; j++) {
			//assignment of notebook_mdetails
			notebook_details = br.readLine().split(" ");
			pages = Integer.parseInt(notebook_details[0]);
			price = Integer.parseInt(notebook_details[1]);

				if(pages >= no_of_pages_required - no_of_pages_left && price <= money) {
					System.out.println("LuckyChef");
					flag = false;
					break;
				}
			}

			if(flag)
				System.out.println("UnluckyChef");
		}
        }

I am getting Runtime error - NZEC in this. Can’t get it to working :confused:

Same as this guy: CNOTE - Editorial

1 Like

Alright. Checking into it right away.

1 Like