import core.bitop;
import std.algorithm;
import std.ascii;
import std.bigint;
import std.conv;
import std.functional;
import std.format;
import std.math;
import std.numeric;
import std.range;
import std.stdio;
import std.string;
import std.random;
import std.typecons;

alias sread = () => readln.chomp();
alias Point2 = Tuple!(long, "y", long, "x");

T lread(T = long)()
{
    return readln.chomp.to!T();
}

T[] aryread(T = long)()
{
    return readln.split.to!(T[])();
}

void scan(TList...)(ref TList Args)
{
    auto line = readln.split();
    foreach (i, T; TList)
    {
        T val = line[i].to!(T);
        Args[i] = val;
    }
}

//累積和でバーーン！！ってやってみる．
void main()
{
    long n, q;
    scan(n, q);
    auto s = sread();
    long[] com_count = new long[n + 1];
    foreach (i, ref e; com_count)
    {
        if (i < 2)
        {
            continue;
        }
        if (s[i - 2 .. i] == "AC")
        {
            com_count[i] = com_count[i - 1] + 1;
        }
        else
        {
            com_count[i] = com_count[i - 1];
        }
    }
    // writeln(com_count);
    foreach (i; 0 .. q)
    {
        long a,b;
        scan(a,b);
        writeln(com_count[b] - com_count[a]);
    }
}