codeforces415D. Glad to see you!(交互)

#include<iostream>
using namespace std;
int N, K;
string Yes = "TAK";
int check(int x) {
    if(x + 1 > N) return 1;
    printf("1 %d %d\n", x, x + 1);
    fflush(stdout);
    string buf;
    cin >> buf;
    return buf == Yes ? 1 : 0;
}
int Query(int l, int r) {
    int ans = -1;
    while(l <= r) {
        int mid = l + r >> 1;
        if(check(mid)) r = mid - 1, ans = mid;
        else l = mid + 1;
    }
    return ans;
}
int main() {
    ios::sync_with_stdio(false); cin.tie(0);
    cin >> N >> K;
    int a1 = Query(1, N);
    int a2 = Query(1, a1 - 1);
    int a3 = Query(a1 + 1, N);
    printf("2 %d %d", a1, a2 == -1 ? a3 : a2);
    return 0;
}