# CONFLIP - Editorial

I have more or less used the same logic but my submission gives wrong answer.
http://www.codechef.com/viewsolution/5963715

Could someone tell me the corner cases?

@arpan…you’re not checking if i==q…in case n is odd…no of coins=n/2+1 when i is not equal to q…but n/2 if i==q

#include<stdio.h>
char replace(char);
int main()
{
int n,i,I,k,q,h=0,t=0,T,G;
char arr[1000];
scanf("%d",&T);
while(T–)
{
while(G–)
{
scanf("%d",&G);
scanf("%d%d%d",&I,&n,&q);
for(i=0;i<n;i++)
{
if(I==1)
{
arr[i]= ‘h’;
}
else
{
arr[i]= ‘t’;
}
}
for(i=0;i<n;i++)
{
if(I==1)
{
arr[i]=‘t’; }
else
{
arr[i]=‘h’;}
for(k=i-1;k>=0;k–)
{
arr[k]= replace(arr[k]);
}
}
for(i=0;i<n;i++)
{
if(arr[i]==‘h’)
{
h++;
}
else
{
t++;
}
}
if(q==1)
{
printf("%d",h);
}
else{
printf("%d",t);
}
}
}

``````return 0;
``````

}
char replace(char ch)
{
if(ch==‘h’)
{
ch=‘t’;
}
else
{
ch=‘h’;
}
return(ch);
}

its showing runtime error. please someone tell me why??

#include
#include<bits/stdc++.h>
#include<string.h>
using namespace std;
void coin1()
{
long int t,j,k,i,n,g,c=0,d=0,m,q;
cin>>t;
while(t>=1)
{
cin>>g;
char a[g];
while(g>=1)
{

``````			cin>>i>>n>>q;
for(j=1;j<=n;j++)
{
if(i==1)
{
a[j]='H';
}
else if(i==2)
{
a[j]='T';
}
}
for(k=1;k<=n;k++)
{
for(j=1;j<=n;j++)
{
if(j<=k)
{
if(a[j]=='H')
{
a[j]='T';
}
else if(a[j]=='T')
{
a[j]='H';
}
}

}
}
j=1;
while(j<=n)
{
if(a[j]=='H')
{
c++;
//cout<<c<<endl;
}
else if(a[j]=='T')
{
d++;
}
j++;
}
if(q==1)
{
cout<<c<<endl;
}
else if(q==2)
{
cout<<d<<endl;
}
c=0;
d=0;
g--;
}
c=0;
d=0;

t--;
``````

}
}

``````int main()
``````

{
coin1();
}

Firstly, I removed that “include<bits stdc++.h=”">" as it led to fatal error.

After that, I put in custom input of Sample case and your code passed. I think that line was the problem.

I suggest removing “include<bits stdc++.h=”">" from your code

(EDIT-The correct code is #include < bits/stdc++.h > Also, the ‘#’ were missing in first three lines. Please see to it dear!)

(Upvote if you like my answer, so that I can also ask questions )

2 Likes

#include
using namespace std;
int main()
{
int t,n,i,g,q;
cin>>t>>n;
while(t–)
{
while(n–)
{
int h=0;
cin>>i>>g>>q;
h=g/2;
if(g%2==0)
{
if(q==1||q==2)
cout<<h<<endl;
}
else
{
if(i==q)
cout<<h<<endl;
else
cout<<h+1<<endl;
}

``````  }
``````

}
return 0;
}

can anyone tell me what’s wrong in this…?

https://www.codechef.com/viewsolution/14978375

I am using the same logic but getting time limit exceeded error.
Here is my code:

My Code Exceeds Time Limit
Can anyone help me with this code

@jatin_b it seems you have removed conio.h but have forgotten to remove clrscr(); from your code…
I wonder how can your code posted can compile sucessfully in linux then…
Resubmit it now…
Hope it doesn’t show RTE then…

You are declaring too much memory for a . The limit for n is 1 ≤ N ≤ 10^9 .you can`t have so much memory . In turbo C++ also if you also try to run for such big value I am sure it won`t run . try to do this without having so much memory .

### Can anyone tell me what is the problem with this code?

``````// Problem Code: CONFLIP on codechef
#include<iostream>
#include<math.h>

using namespace std;

int main(){
int T;
cin>>T;

for(int t=1;t<=T;t++){
int G;
cin>>G;
for(int g=1;g<=G;g++){
int I,N,Q;
cin>>I>>N>>Q;

int coinsInterested = Q==1? (I==1?N:0) : (I==2?N:0) ;

int changes = ceil(float(N)/2);

if(coinsInterested==0){
coinsInterested+=changes;
}
else{
coinsInterested-=changes;
}

cout<<coinsInterested<<endl;
}
}

return 0;
}
``````

Can you please identify the issue with this code? It’s a short solution won’t take much of your time. I have been stuck at this for more than an hour now. What’s wrong?

The sample cases run okay. But in submission, I get wrong answer.
Also, I am failing the following case (someone mentioned in the comments on a post) -
Input -
2
2
1 5 1
1 5 2
1
1 5 1

Expected Output -
2
3
2

But my program terminates after the second line.

``````#include <iostream>
using namespace std;

int main() {
int tcases; cin >> tcases;

// declare variables
int g,i,q=0; long int n=0;

for(int i = 0; i < tcases; i++){

cin>>g;
for (int j = 0; j < g; j++)
{
cin>>i>>n>>q;
if(n%2==0) cout<<n/2;
else (q==i) ? (cout<<(n-1)/2):(cout<<(n+1)/2);
printf("\n");
}

}
return 0;
}``````

You should take G as input before the while loop of G

you are using i for the test cases loop and also for initial state of the coins,it is causing conflict.Use k or some other variable in the tcases loop instead of i,it will run perfectly.

I am using the same logic but still getting the wrong answers. Can anyone helps me?

if name == “main”:
try:
t = int(input())
for i in range(t):
g = int(input())
for j in range(g):
arr = list(map(int,input().split()))
if arr[1]%2 == 0:
print(arr[1]//2)
break
else:
if arr[0] == arr[2]:
print(arr[1]//2)
elif arr[0] != arr[2]:
print((arr[1]//2) + 1)
except EOFError:
pass

Here is my code in python.

A simple code
#include
using namespace std;

int main() {
int t,g,i,n,q;
cin>>t;
while(t–){
cin>>g;
while(g–){
cin>>i>>n>>q;
if(n%2==0){
cout<<n/2<<endl;
}else{
if(i==q){
cout<<n/2<<endl;
}else{
cout<<(n/2)+1<<endl;
}
}
}
}
return 0;
}

this my code and it works perfectly fine in custom inputs without any problem , but during the submission it shows time limit exceeded.

MY CODE:-

T = int(input())

for i in range(1,T+1):

``````G = int(input())

for u in range(1,G+1):

I,N,Q = input().split()

I = int(I)

N = int(N)

Q = int(Q)

k = 1

mylist = list()

for z in range(0,N):

mylist.append(I)

for i in range(0,N):

for j in range(0,k):

if (mylist[j] == 1):

mylist[j] = 2

else:

mylist[j] = 1

k = k + 1

if (Q == 1):

count = mylist.count(Q)

print(count)

else:

count = mylist.count(Q)

print(count)``````

i have written according to what i understood…the code runs fine and gives correct output but at time of submission it shows Time limit exceeded ! How can i optimize it!

``````#include <iostream>
#include<algorithm>
using namespace std;

int getGuesses(int init, int n, int q) {
int arr[n];
int count=0;
fill_n(arr + 1, n, init);
for(int i=1; i<=n; i++) {
for(int j=1; j<=i; j++) {
arr[j] = (arr[j]%2==0) ? 1 : 2;
}
}
for(int i=1; i<=n; i++) {
if(arr[i]==q) {
++count;
}
}
return count;

}

int main() {
ios_base::sync_with_stdio(false);
cin.tie(NULL);
int test, g, ini, n, q, count=0;
cin >> test;
while(test--) {
cin >> g;
while(g--) {
cin >> ini >> n >> q;
count = getGuesses(ini, n, q);
cout << count << "\n";
}
}
return 0;
}``````