学步园

//蛮水的线段树
//2777
//用scanf（）   用位运算

#include <cstdio>
#include <cstring>
using namespace std;
const int MAXL = 100000 + 5;
const int MAXT = 30 + 5;
int L, T, O, a, b, c, ans;
bool vis[MAXT * 3];
char cmd;
struct node{
int l, r;
int c;
};
node tree[MAXL * 3];
void build(int i, int l, int r){
    tree[i].l = l; tree[i].r = r;
    tree[i].c = (i==1? 1 : 0);                //注意题意：起始时刻颜色为1！

if(tree[i].l == tree[i].r) return;
int mid = (l + r) >> 1;
    build(i<<1, l, mid);
    build(i<<1 | 1, mid+1, r);
}
void insert(int i, int l, int r, int c){
if(tree[i].l == l && tree[i].r == r){
        tree[i].c = c;
return;
    }
if(tree[i].l == tree[i].r) return;
if(tree[i].c > 0 && tree[i].c != c){
        tree[i<<1].c = tree[i].c;
        tree[i<<1|1].c = tree[i].c;
        tree[i].c = 0;
    }
int mid = (tree[i].l + tree[i].r) >> 1;        //开始居然写成（l+r）>>1!!WA了n次
    if(r <= tree[i<<1].r){
        insert(i<<1, l, r, c);
    }
else if(l >= tree[i<<1|1].l){
        insert(i<<1|1, l, r, c);
    }
else{
        insert(i<<1, l, mid, c);
        insert(i<<1|1, mid+1, r, c);
    }
}
void cal(int i, int l, int r){
if(tree[i].r < l || tree[i].l > r) return;
if(tree[i].c > 0){
if(!vis[tree[i].c]){
            vis[tree[i].c] = 1;
            ans++;
        }
return;
    }
    cal(i<<1, l, r);
    cal(i<<1 | 1, l, r);
}
int main(){
    scanf("%d%d%d", &L, &T, &O);
    build(1, 1, L);
for(int i=0; i<O; i++){
        scanf("%c", &cmd);
        scanf("%c", &cmd);
if(cmd == 'C'){
            scanf("%d%d%d", &a, &b, &c);
if(a <= b)
                insert(1, a, b, c);
else{
                insert(1, b, a, c);        //a>b 则从b到a （题意没表述清）
            }
        }
else{
            scanf("%d%d", &a, &b);
            ans = 0;
            memset(vis, 0, sizeof(vis));
if(a <= b)
                cal(1, a, b);
else{
                cal(1, b, a);
            }
            printf("%d\n", ans);
        }
    }
return 0;
}