#include #include #include #include #include #include #include #include #define debug_value(x) cerr << "line" << __LINE__ << ":<" << __func__ << ">:" << #x << "=" << x << endl; #define debug(x) cerr << "line" << __LINE__ << ":<" << __func__ << ">:" << x << endl; template inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; } template inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; } using namespace std; typedef long long ll; template struct segtree{ int n; T UNIT; vector dat; T (*calc)(T, T); segtree(int n_, T unit, T (*_calc)(T, T)){ UNIT = unit; calc = _calc; n = 1; while(n < n_) n *= 2; dat = vector(2*n); for(int i = 0; i < 2*n; i++) dat[i] = UNIT; } void insert(int k, T a){ dat[k+n-1] = a; } void update_all(){ for(int i = n-2; i >= 0; i--){ dat[i] = calc(dat[i*2+1], dat[i*2+2]); } } //k番目の値(0-indexed)をaに変更 void update(int k, T a){ k += n-1; dat[k] = a; while(k > 0){ k = (k-1)/2; dat[k] = calc(dat[k*2+1], dat[k*2+2]); } } //[a, b) //区間[a, b]へのクエリに対してはquery(a, b+1)と呼ぶ T query(int a, int b, int k=0, int l=0, int r=-1){ if(r < 0) r = n; if(r <= a || b <= l) return UNIT; if(a <= l && r <= b) return dat[k]; else{ T vl = query(a, b, k*2+1, l, (l+r)/2); T vr = query(a, b, k*2+2, (l+r)/2, r); return calc(vl, vr); } } }; int unit = 0; int calc(int a, int b){ if(a == unit) return b; if(b == unit) return a; return a; } int main(){ ios::sync_with_stdio(false); cin.tie(0); cout << setprecision(10) << fixed; int n; string s, t; cin >> n >> s >> t; segtree sgt(n, unit, calc); auto update = [&](int i){ if(s[i] == t[i]){ sgt.update(i, unit); }else if(s[i] > t[i]){ sgt.update(i, 1); }else{ sgt.update(i, -1); } }; for(int i = 0; i < n; i++){ update(i); } int q; cin >> q; while(q--){ char c; int x, y; cin >> c >> x >> y; x--; if(c == 'S') s[x] = '0'+y; else t[x] = '0'+y; update(x); int m = sgt.query(0, n); if(m == 0) cout << "=" << endl; else if(m == -1) cout << "<" << endl; else cout << ">" << endl; // cout << s << ' ' << t << endl; // for(int i = 0; i < n; i++) cout << sgt.query(i, i+1) << ' '; // cout << endl; } }