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If there is something like mom's. is it a word?

Can anyone please help me?? I am getting WA, but i dont know for which data.
Here is my codeL

#include <iostream>
#include <stdio.h>
#include <vector>
using namespace std;
long long dp[5000005];
int main()
{
int a,b,l,h,i,num;
long long ans,ct;
long long n;

dp[1]=0;
while(1)
{
scanf("%d %d ...