#ifndef HIDDEN_IN_VS // 折りたたみ用 // 警告の抑制 #define _CRT_SECURE_NO_WARNINGS // ライブラリの読み込み #include using namespace std; // 型名の短縮 using ll = long long; using ull = unsigned long long; // -2^63 ~ 2^63 = 9 * 10^18(int は -2^31 ~ 2^31 = 2 * 10^9) using pii = pair; using pll = pair; using pil = pair; using pli = pair; using vi = vector; using vvi = vector; using vvvi = vector; using vvvvi = vector; using vl = vector; using vvl = vector; using vvvl = vector; using vvvvl = vector; using vb = vector; using vvb = vector; using vvvb = vector; using vc = vector; using vvc = vector; using vvvc = vector; using vd = vector; using vvd = vector; using vvvd = vector; template using priority_queue_rev = priority_queue, greater>; using Graph = vvi; // 定数の定義 const double PI = acos(-1); const vi DX = { 1, 0, -1, 0 }; // 4 近傍(下,右,上,左) const vi DY = { 0, 1, 0, -1 }; int INF = 1001001001; ll INFL = 4004004003104004004LL; // (int)INFL = 1010931620; // 入出力高速化 struct fast_io { fast_io() { cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(18); } } fastIOtmp; // 汎用マクロの定義 #define all(a) (a).begin(), (a).end() #define sz(x) ((int)(x).size()) #define lbpos(a, x) (int)distance((a).begin(), std::lower_bound(all(a), x)) #define ubpos(a, x) (int)distance((a).begin(), std::upper_bound(all(a), x)) #define Yes(b) {cout << ((b) ? "Yes\n" : "No\n");} #define rep(i, n) for(int i = 0, i##_len = int(n); i < i##_len; ++i) // 0 から n-1 まで昇順 #define repi(i, s, t) for(int i = int(s), i##_end = int(t); i <= i##_end; ++i) // s から t まで昇順 #define repir(i, s, t) for(int i = int(s), i##_end = int(t); i >= i##_end; --i) // s から t まで降順 #define repe(v, a) for(const auto& v : (a)) // a の全要素(変更不可能) #define repea(v, a) for(auto& v : (a)) // a の全要素(変更可能) #define repb(set, d) for(int set = 0, set##_ub = 1 << int(d); set < set##_ub; ++set) // d ビット全探索(昇順) #define repis(i, set) for(int i = lsb(set), bset##i = set; i >= 0; bset##i -= 1 << i, i = lsb(bset##i)) // set の全要素(昇順) #define repp(a) sort(all(a)); for(bool a##_perm = true; a##_perm; a##_perm = next_permutation(all(a))) // a の順列全て(昇順) #define smod(n, m) ((((n) % (m)) + (m)) % (m)) // 非負mod #define uniq(a) {sort(all(a)); (a).erase(unique(all(a)), (a).end());} // 重複除去 #define EXIT(a) {cout << (a) << endl; exit(0);} // 強制終了 #define inQ(x, y, u, l, d, r) ((u) <= (x) && (l) <= (y) && (x) < (d) && (y) < (r)) // 半開矩形内判定 // 汎用関数の定義 template inline ll powi(T n, int k) { ll v = 1; rep(i, k) v *= n; return v; } template inline bool chmax(T& M, const T& x) { if (M < x) { M = x; return true; } return false; } // 最大値を更新(更新されたら true を返す) template inline bool chmin(T& m, const T& x) { if (m > x) { m = x; return true; } return false; } // 最小値を更新(更新されたら true を返す) template inline T get(T set, int i) { return (set >> i) & T(1); } // 演算子オーバーロード template inline istream& operator>>(istream& is, pair& p) { is >> p.first >> p.second; return is; } template inline istream& operator>>(istream& is, vector& v) { repea(x, v) is >> x; return is; } template inline vector& operator--(vector& v) { repea(x, v) --x; return v; } template inline vector& operator++(vector& v) { repea(x, v) ++x; return v; } #endif // 折りたたみ用 #if __has_include() #include using namespace atcoder; #ifdef _MSC_VER #include "localACL.hpp" #endif //using mint = modint1000000007; using mint = modint998244353; //using mint = modint; // mint::set_mod(m); namespace atcoder { inline istream& operator>>(istream& is, mint& x) { ll x_; is >> x_; x = x_; return is; } inline ostream& operator<<(ostream& os, const mint& x) { os << x.val(); return os; } } using vm = vector; using vvm = vector; using vvvm = vector; using vvvvm = vector; #endif #ifdef _MSC_VER // 手元環境(Visual Studio) #include "local.hpp" #else // 提出用(gcc) inline int popcount(int n) { return __builtin_popcount(n); } inline int popcount(ll n) { return __builtin_popcountll(n); } inline int lsb(int n) { return n != 0 ? __builtin_ctz(n) : -1; } inline int lsb(ll n) { return n != 0 ? __builtin_ctzll(n) : -1; } inline int msb(int n) { return n != 0 ? (31 - __builtin_clz(n)) : -1; } inline int msb(ll n) { return n != 0 ? (63 - __builtin_clzll(n)) : -1; } #define dump(...) #define dumpel(v) #define dump_list(v) #define dump_mat(v) #define input_from_file(f) #define output_to_file(f) #define Assert(b) { if (!(b)) while (1) cout << "OLE"; } #endif //【写像の合成(モノイド)】 /* * Map_accumulate(vi f, vS a, ll I) : O(n log I) * [0..n) 上の写像 f : x → f[x] と列 a[0..n) で初期化する.f^I まで計算可能とする. * * int apply(int x, ll i) : O(log i) * f^i(x) を返す. * * S accumulate(int x, ll r) : O(log r) * Πa[f^[0..r)(x)] を返す. * * ll max_right(int x, function& okQ) : O(log I) * okQ(f^i(x), Πa[f^[0..i)(x)]) = true かつ okQ(f^(i+1)(x), Πa[f^[0..i+1)(x)]) = false なる i を返す. * *(ダブリング) */ template class Map_accumulate { int n, K; // nxt[k][x] : f^(2^k)[x] vvi nxt; // acc[k][x] : Σi∈[0..2^k) a[f^i[x]] using vS = vector; using vvS = vector; vvS acc; public: // [0..n) 上の写像 f : x → f[x] と数列 a[0..n) で初期化する.f^I まで計算可能とする. Map_accumulate(const vi& f, const vS& a, ll I) : n(sz(f)), K(msb(max(I, 1LL)) + 1), nxt(K, vi(n)), acc(K, vS(n)) { // verify : https://atcoder.jp/contests/abc241/tasks/abc241_e // f^(2^0)[x] = f[x] rep(x, n) nxt[0][x] = f[x]; // Σi=[0..2^0) a[f^i[x]] = a[x] rep(x, n) acc[0][x] = a[x]; rep(k, K - 1) { rep(x, n) { // 例: // f^8[x] = f^4[ f^4[x] ] nxt[k + 1][x] = nxt[k][nxt[k][x]]; // 例: // a[f^0[x]] + a[f^1[x]] + a[f^2[x]] + a[f^3[x]] // + a[f^4[x]] + a[f^5[x]] + a[f^6[x]] + a[f^7[x]] // = a[f^0[x]] + a[f^1[x]] + a[f^2[x]] + a[f^3[x]] // + a[f^0[ f^4[x] ]] + a[f^1[ f^4[x] ]] + a[f^2[ f^4[x] ]] + a[f^3[ f^4[x] ]] acc[k + 1][x] = op(acc[k][x], acc[k][nxt[k][x]]); } } } // f^i(x) を返す. int apply(int x, ll i) const { // verify : https://atcoder.jp/contests/tessoku-book/tasks/tessoku_book_be Assert(0 <= x && x < n); int k = 0; while (i > 0) { if (i & 1) x = nxt[k][x]; i >>= 1; k++; } return x; } // Πi=[0..r) a[ f^i(x) ] を返す. S accumulate(S x, ll r) const { // verify : https://atcoder.jp/contests/abc241/tasks/abc241_e Assert(0 <= x && x < n); int k = 0; S val = e(); while (r > 0) { if (r & 1) { val = op(val, acc[k][x]); x = nxt[k][x]; } r >>= 1; k++; } return val; } // okQ(f^i(x), Πa[f^[0..i)(x)]) = true かつ okQ(f^(i+1)(x), Πa[f^[0..i+1)(x)]) = false なる i を返す. ll max_right(int x, const function& okQ) const { // verify : https://atcoder.jp/contests/arc169/tasks/arc169_b Assert(0 <= x && x < n); if (!okQ(x, e())) return -1; ll i = 0; S val = e(); repir(k, K - 1, 0) { i <<= 1; auto nval = op(val, acc[k][x]); if (okQ(nxt[k][x], nval)) { i++; val = nval; x = nxt[k][x]; } } return i; } #ifdef _MSC_VER friend ostream& operator<<(ostream& os, const Map_accumulate& ma) { rep(k, ma.K) { os << (1LL << k) << ":" << endl; rep(x, ma.n) os << ma.nxt[k][x] << " "; os << endl; rep(x, ma.n) os << ma.acc[k][x] << " "; os << endl; } return os; } #endif /* okQ の定義の雛形 using S = ll; auto okQ = [&](int x, S acc) { return true || false; }; */ }; //【組の総和 可換モノイド】 /* verify : https://atcoder.jp/contests/jsc2021/tasks/jsc2021_f */ using S023 = pll; S023 op023(S023 a, S023 b) { return { a.first + b.first, a.second + b.second }; } S023 e023() { return { 0, 0 }; } #define PairSum_monoid S023, op023, e023 int main() { // input_from_file("input.txt"); // output_to_file("output.txt"); int n, q; string s; cin >> n >> q >> s; vi nxt(n); iota(all(nxt), 1); nxt[n - 1] = 0; vector cnt(n); rep(i, n) { if (s[i] == 'D') cnt[i] = { 1, 0 }; else cnt[i] = { 0, 1 }; } Map_accumulate M(nxt, cnt, (ll)1e9 + 10); // 上限をうっかりミス rep(hoge, q) { ll h, w; int p; cin >> h >> w >> p; using S = S023; auto okQ = [&](int x, S acc) { auto [d, r] = acc; return d < h && r < w; }; ll t = M.max_right(p, okQ); dump(t); cout << M.apply(p, t + 1) << endl; } }