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I can't find the problem of my code. Its showing wrong answer.
Here is the code:

#include<iostream>
using namespace std;
int main()
{
int i,j,k,amplitude,frequency,test_case;
cin>> test_case;
cin>>amplitude>>frequency;
while(test_case--){
for(k=1;k<=frequency;k++){
for(i=1;i<=amplitude;i ...