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Friend or Girlfriend CodeChef Solution

Friend or Girlfriend CodeChef Solution in C++14

``````#include <iostream>
using namespace std;
#define ll long long int
int main() {
int t;
cin>>t;
while (t--)
{
ll n;
cin>>n;
string str;
char c;
cin>>str>>c;
ll ans =0;
ll count =0;
for (ll q=0; q<n; q++)
{
if (str[q]==c)
{
ans = ans + ((count*(count+1))/2);
count =0;
}
else
{
count ++;
}

}
ans = ans + ((count*(count+1))/2);
n= (n*(n+1))/2;
cout<<n-ans<<endl;
}
return 0;
}``````

Friend or Girlfriend CodeChef Solution in PYTH 3

``````
for _ in range(int(input())):
n = int(input())
s, x = input().split()
l = [-1]
not_sub = 0
for i in range(len(s)):
if (s[i] == x):
l.append(i)
l.append(n)
for i in range(1, len(l)):
k = l[i]-l[i-1]-1
not_sub += k*(k+1)/2

ans = (n*(n+1)/2)-not_sub
print(int(ans))``````

Friend or Girlfriend CodeChef Solution in C

``````#include <stdio.h>
#include <string.h>
void sol()
{
long long int n,sum,tol=0;
scanf("%lli", &n);
char s[n+2];
scanf("%s", s);
char c;

do
{
scanf("%c", &c);
}while(c==' ');

long long int l=strlen(s);
sum=(l*(l+1))/2;

long long int i=0,y=0;
while(i<l)
{
if(s[i]!=c)
y++;
else
{
tol+=(y*(y+1))/2;
y=0;
}
i++;
}
if(y>0)
tol+=(y*(y+1))/2;
printf("%lli", sum-tol);
}
int main()
{
int t;
scanf("%i", &t);

while(t--)
{
sol();
printf("\n");
}
}``````

Friend or Girlfriend CodeChef Solution in JAVA

``````/* package codechef; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Codechef
{
public static void main (String[] args) throws java.lang.Exception
{
BufferedWriter writer=new BufferedWriter(new OutputStreamWriter(System.out));
while(tt-->0){
String s=parts[0];
char c=parts[1].charAt(0);
long total=0L;
for(int i=0;i<n;){
int j=i;
while(j<n && s.charAt(j)!=c){
j++;
}
if(i==j){
i++;
}else{
int l=j-i;
total+=(l*(l+1L))/2L;
i=j;
}
}
writer.write(((n*(n+1L))/2L-total)+"\n");
}
writer.flush();
}

private static int[] parseInt(String str) {
String[] parts=str.split("\\s+");
int[] ans=new int[parts.length];
for(int i=0;i<ans.length;i++){
ans[i]=Integer.parseInt(parts[i]);
}
return ans;
}

private static long[] parseLong(String str) {
String[] parts=str.split("\\s+");
long[] ans=new long[parts.length];
for(int i=0;i<ans.length;i++){
ans[i]=Long.parseLong(parts[i]);
}
return ans;
}
}``````

Friend or Girlfriend CodeChef Solution in PYPY 3

``````for _ in range(int(input())):
n = int(input())
a, b = input().split()
i = n-1
ans = 0
last = 0
while(i>= 0):
if a[i] == b:
ans += n-i
last = n-i
else:
ans += last
i -=1
print(ans)``````

Friend or Girlfriend CodeChef Solution in PYTH

``````t = int(raw_input())
for i in range(t):
N = int(raw_input())
st = raw_input().split()
s = st[0]
X = st[1]
r = N*(N+1)/2
n = 0
for x in s:
if x == X:
r -= n*(n+1)/2
n = 0
else:
n += 1
# endif
# endfor x
r -= n*(n+1)/2
print r
# endfor i
``````

Friend or Girlfriend CodeChef Solution in C#

``````using System;

public class Test
{
public static void Main()
{
while (t > 0)
{
string[] tokens = line.Split(' ');
string s = tokens[0];
char x = tokens[1][0];

int lastPos = -1;
for (int i = 0; i < n; i++)
{
if (s[i] == x)
{
if (lastPos == -1)
{
lastPos = i;
}
else
{
answer += (lastPos + 1) * (i - lastPos);
lastPos = i;
}
}
}

answer += (lastPos + 1) * (n - lastPos);
t--;
}
}
}``````

Friend or Girlfriend CodeChef Solution in NODEJS

``````var input = ``;

function cacheInput(data) {
input += data;
}

var lineNumber = 0;
function main() {
let lines = input.split('\n');
let noOfTestCases = Number(lines[lineNumber++]);

// Go through each test case
while(noOfTestCases--){
// Input string length
let strLen = Number(lines[lineNumber++]);
let [str,ch] = lines[lineNumber++].split(' ');
let ans = ((strLen)*(strLen+1))/2;
count = 0;
for(let i=0;i<str.length;i++){
if(str[i] == ch){
ans -= (count*(count+1))/2;
count = 0;
}else{
count++;
}
}
ans -= (count*(count+1))/2;

console.log(ans);
}
}

process.stdin.resume();
process.stdin.setEncoding('utf8');
process.stdin.on('data', cacheInput).on('end', main);``````

Friend or Girlfriend CodeChef Solution in GO

``````package main

import "fmt"

func main() {
var i, n, t int64
var s, dummy string
var x rune
fmt.Scanln(&t)
for i = 0; i < t; i++ {
fmt.Scanln(&n)
fmt.Scanf("%s %c", &s, &x)
fmt.Scanln(&dummy)
fmt.Println(calSub(n, s, x))
}
}

func calSub(n int64, s string, x rune) int64 {
var m []int64
var i, ans, prev, val int64
ans = 0
prev = 0
for i = 0; i < n; i++ {
if byte(x) == s[i] {
m = append(m, i+1)
}
}

// fmt.Println(m)
for _, val = range m {
temp := (val-prev)*(n-val+1)
ans = ans + temp
prev = val
}

return ans
}``````
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