thats a beautiful solution
i think that in the place of : speed = max(speed,maxSpeed)
it should be : speed = min(speed,maxSpeed)
Hi,
Can anyone please suggest me. What I am doing wrong in my solution
That isn’t the proper link to the solution, please check it and send the correct one 
1 Like
#include
using namespace std;
void fastscan(int &number)
{
//variable to indicate sign of input number
bool negative = false;
register int c;
number = 0;
// extract current character from buffer
c = getchar();
if (c=='-')
{
// number is negative
negative = true;
// extract the next character from the buffer
c = getchar();
}
// Keep on extracting characters if they are integers
// i.e ASCII Value lies from '0'(48) to '9' (57)
for (; (c>47 && c<58); c=getchar())
number = number *10 + c - 48;
// if scanned input has a negative sign, negate the
// value of the input number
if (negative)
number *= -1;
}
int main() {
int t ;
fastscan(t);
for (int i =0;i<t; i++)
{
int n ;
fastscan(n);
int a[n],z= 0;
// cout <<"Vlaue of n = "<<n<<endl;
for (int j=0 ;j<n;j++)
{
fastscan(a[j]);
}
if (n==1)
cout<<n<<endl;
else{
for (int j = 0;j<n–;j++){
// cout<<"value of j = "<<j <<endl;
// cout <<"Vlaue of a[j] = "<<a[j]<<endl;
//cout <<"Vlaue of a[j+1] = "<<a[j+1]<<endl;
if (a[j]>=a[j+1]){
z++;
// cout<<z<<endl;
}
else {
a[j+1]=a[j];
}
}
cout <<z+1<<endl;
}
}
}
//What is wrong in this code can anyone explain please
My Solution without using extra space
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
void solve() {
int n, ans=0;
cin>>n;
vector<int> max_speed(n);
for(int i=0;i<n;i++) {
cin>>max_speed[i];
}
ans++;
if(n==1) {
cout<<ans<<endl;
return;
} else {
for(int i=1;i<n;i++) {
if(max_speed[i] <= max_speed[i-1]) {
ans++;
} else {
max_speed[i] = max_speed[i] - (abs(max_speed[i] - max_speed[i-1]));
}
}
}
cout<<ans<<endl;
}
int main() {
#ifndef ONLINE_JUDGE
freopen("input.txt", "r", stdin);
#endif
ios_base::sync_with_stdio(false);
cin.tie(NULL);
int T;
cin>>T;
while(T--) {
solve();
}
return 0;
}
`#include <bits/stdc++.h>
using namespace std;
int main() {
// your code goes here
int t;
cin>>t;
while(t--){
int n,count=0,max=0,s=0;
cin>>n;
cin>>s;
max=s;
count++;
for(int i=0;i<n-1;i++){
cin>>s;
if(s<max){
count++;
max=s;
}
}
cout<<count<<endl;
}
return 0;
}
`
1 Like
Hello Every One,
I have written a code for this question & tested it on sample input. It works as expected. But when I submitted the solution I am getting WA for all test cases. I have checked excepted solutions and editorials but I am not getting where I am going wrong.
Please help me understand my mistake.
My solution is Here
Thanks in Advance.
1 Like
Why this solution was accepted
n = int(input())
count = 0
for i in range(n):
c = int(input())
s = list(map(int, input().split()))
ans = s[0]
for j in range(c):
if s[j] <= ans:
ans = s[j]
count += 1
print(count)
count = 0
and not this one as both seems to be the same math after all
n = int(input())
count = 0
for i in range(n):
c = int(input())
s = list(map(int, input().split()))
for j in range(1, c):
if s[j] >= s[j-1]:
count += 1
print(c-count)
count = 0#include <bits/stdc++.h>
using namespace std;
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);
long long n;
scanf("%lld",&n);
while(n--){
int minspeed=INT_MAX;
int q;
scanf("%d",&q);
int ans=0;
while(q--){
int speed;
scanf("%d",&speed);
if(speed<=minspeed){
minspeed=min(speed,minspeed);
ans++;
}
}
cout<<ans<<endl;
}
}
I did it without the use of arrays
#include <iostream>
#include <algorithm>
using namespace std;
int main() {
// your code goes here
int t; cin>>t;
while(t--)
{
int n; cin>>n;
int32_t mn = 10001, x = 10001, ans=0;
for(int i=0;i<n;++i)
{
cin>>x;
mn = min(x,mn);
if(mn>=x)
{
ans++;
}
}
// 45123
// 44111
cout<<ans<<'\n';
}
return 0;
}
I need to understand at which test case would this fail?
Can anyone explain why it is wrong solution, output is correct you can check
#include
using namespace std;
int main(){
int T,N,arr[N],max=1;
cin>>T;
while(T–){
cin>>N;
for (int i = 0; i < N; i++)
{
cin>>arr[i];
}
for (int i = 1; i < N; i++)
{
if (arr[i]<=arr[i-1])
{
max++;
}
}
cout<<max<<endl;
max=1;
}
return 0;
}
Please either format your code or (better!) link to your submission - the forum software has mangled it and it won’t compile! 
Edit:
Neither mind - I can figure it out. Pay attention to compiler warnings!
[simon@simon-laptop][13:37:52]
[~/devel/hackerrank/otherpeoples]>./compile-latest-cpp.sh
Compiling ansh2002-CARVANS.cpp
Executing command:
g++ -std=c++17 ansh2002-CARVANS.cpp -O3 -g3 -Wall -Wextra -Wconversion -DONLINE_JUDGE -D_GLIBCXX_DEBUG -fsanitize=undefined -ftrapv
ansh2002-CARVANS.cpp: In function ‘int main()’:
ansh2002-CARVANS.cpp:5:18: warning: ‘N’ is used uninitialized in this function [-Wuninitialized]
5 | int T,N,arr[N],max=1;
| ^
Successful
https://www.codechef.com/viewsolution/55952316
Thanks for your reply, I dont actually understand it but i found that i was missing an else condition in code which I corrected and it got submitted
For Python users:
All the best !!
n = int(input())
for i in range(n):
cars = int(input())
speed = [int(j) for j in input().split()]
min, c = speed[0], 1
for i in range(1, cars):
if speed[i] <= min:
c += 1
min = speed[i]
print(c)