1552A - Subsequence Permutation - CodeForces Solution

sortings strings *800

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Python Code: 

qtd = int(input())
lista = list()

for i in range(0,qtd):
    tam = int(input())
    palavra = input()
    cont = 0
    s = sorted(palavra)

    for i in range(0,tam):
        if palavra[i] != s[i]:
            cont = cont +1
    lista.append(cont)        

for i in range(0,qtd):
    print(lista[i])

C++ Code: 

#include <bits/stdc++.h>

#define rep(i,n) for(int i=0;i<n;++i)
#define repn(i,n) for(int i=1;i<=n;++i)
#define LL long long
#define fi first
#define se second
#define pb push_back
#define mpr make_pair

using namespace std;

void fileio()
{
  #ifdef LGS
  freopen("in.txt","r",stdin);
  freopen("out.txt","w",stdout);
  #endif
}
void termin()
{
  #ifdef LGS
  std::cout<<"\n\nEXECUTION TERMINATED";
  #endif
  exit(0);
}

int t,n;
string s;

int main()
{
  fileio();

  cin>>t;
  rep(tn,t)
  {
    cin>>n>>s;
    string ss=s;
    sort(ss.begin(),ss.end());
    int ans=0;
    rep(i,n) if(s[i]!=ss[i]) ++ans;
    cout<<ans<<endl;
  }

  termin();
}


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