#635317 (C++14) No.1439 Let's Compare!!!!

• 問題: No.1439 Let's Compare!!!!
• ユーザー: 🍮かんプリン
• 提出日時: 2021-03-28 14:42:53
• 言語: C++14 (gcc 12.3.0 + boost 1.83.0)
• 結果: AC
• 実行時間: 433 ms / 2,000 ms
• コード長: 3,540 bytes
• コンパイル時間: 2,106 ms
• コンパイル使用メモリ: 176,572 KB
• 実行使用メモリ: 4,384 KB
• 最終ジャッジ日時: 2023-08-19 15:34:44
• 合計ジャッジ時間: 6,527 ms
• ジャッジサーバーID （参考情報）: judge15 / judge11

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	1 ms; 4,376 KB
testcase_01	AC	1 ms; 4,376 KB
testcase_02	AC	1 ms; 4,376 KB
testcase_03	AC	1 ms; 4,380 KB
testcase_04	AC	1 ms; 4,376 KB
testcase_05	AC	1 ms; 4,380 KB
testcase_06	AC	2 ms; 4,376 KB
testcase_07	AC	8 ms; 4,376 KB
testcase_08	AC	13 ms; 4,380 KB
testcase_09	AC	5 ms; 4,376 KB
testcase_10	AC	391 ms; 4,384 KB
testcase_11	AC	404 ms; 4,380 KB
testcase_12	AC	399 ms; 4,380 KB
testcase_13	AC	399 ms; 4,380 KB
testcase_14	AC	392 ms; 4,380 KB
testcase_15	AC	433 ms; 4,380 KB
testcase_16	AC	402 ms; 4,376 KB
testcase_17	AC	403 ms; 4,380 KB
testcase_18	AC	356 ms; 4,380 KB

ソースコード

/**
 *   @FileName	a.cpp
 *   @Author	kanpurin
 *   @Created	2021.03.28 14:25:55
**/

#include "bits/stdc++.h" 
using namespace std; 
typedef long long ll;


template < class Monoid >
struct SegmentTree {
private:
    using Func = std::function< Monoid(Monoid, Monoid) >;
    Func F;
    Monoid UNITY;
    int n;
    std::vector< Monoid > node;
    int _binary_search(int a, int b, const std::function<bool(Monoid)> &f, Monoid &s, int k = 0, int l = 0, int r = -1) {
        if (r < 0) r = n;
        if (r <= a || b <= l) return n;
        if (a <= l && r <= b && !f(F(s,node[k]))) {
            s = F(s,node[k]);
            return n;
        }
        if (l == r - 1) {s = F(s,node[k]); return l;}
        int ret = _binary_search(a, b, f, s, 2 * k + 1, l, (r - l) / 2 + l);
        return ret != n ? ret : _binary_search(a, b, f, s, 2 * k + 2, (r - l) / 2 + l, r);
    }
public:
    SegmentTree() {}
    SegmentTree(const std::vector< Monoid > &v, const Func f, const Monoid &unity) {
        F = f;
        UNITY = unity;
        int sz = v.size();
        n = 1;
        while (n < sz) n <<= 1;
        node.resize(n * 2 - 1, UNITY);
        for (int i = 0; i < sz; i++) node[i + n - 1] = v[i];
        build();
    }
    
    SegmentTree(int m, const Monoid &val, const Func f, const Monoid &unity) {
        F = f;
        UNITY = unity;
        n = 1;
        while (n < m) n <<= 1;
        node.resize(n * 2 - 1, UNITY);
        if (val != UNITY) {
            for (int i = 0; i < m; i++) node[i + n - 1] = val;
            build();
        }
    }
    
    void set(int k, const Monoid &x) {
        node[n + k - 1] = x;
    }
    void build() {
        for (int i = n - 2; i >= 0; i--) node[i] = F(node[2 * i + 1], node[2 * i + 2]);
    }
    void update_query(int x, const Monoid &val) {
        if (x >= n || x < 0) return;
        x += n - 1;
        node[x] = val;
        while (x > 0) {
            x = (x - 1) >> 1;
            node[x] = F(node[2 * x + 1], node[2 * x + 2]);
        }
    }
    
    Monoid get_query(int l, int r) {
        Monoid L = UNITY, R = UNITY;
        if (l < 0) l = 0;
        if (r < 0) return UNITY;
        if (l >= n) return UNITY;
        if (r >= n) r = n;
        for (l += n, r += n; l < r; l >>= 1, r >>= 1) {
            if (l & 1) L = F(L, node[l++ - 1]);
            if (r & 1) R = F(node[--r - 1], R);
        }
        return F(L, R);
    }
    
    
    int binary_search(int l, int r, const std::function<bool(Monoid)> &f) {
        Monoid s = UNITY;
        int ret = _binary_search(l,r,f,s);
        return ret != n ? ret : -1;
    }
    Monoid operator[](int x) const {
        return node[n + x - 1];
    }
    int size() {
        return n;
    }
    void print() {
        for (int i = 0; i < n; i++) {
            std::cout << i << "\t: " << node[n + i - 1] << std::endl;
        }
    }
};
int main() {
    int n;cin >> n;
    string s,t;cin >> s >> t;
    int q;cin >> q;
    vector<bool> a(n);
    for (int i = 0; i < n; i++) a[i] = s[i] != t[i];
    SegmentTree<bool> seg(a,[](bool a, bool b){return a | b;},false);
    while(q--) {
        char c; int x,y;cin >> c >> x >> y;
        if (c == 'S') s[x-1] = char(y+'0');
        else t[x-1] = char(y+'0');

        if (s[x-1] == t[x-1]) seg.update_query(x-1,false);
        else seg.update_query(x-1,true);
        int k = seg.binary_search(0,n,[](bool a){return a;});
        if (k == -1) cout << '=' << endl;
        else if (s[k] < t[k]) cout << '<' << endl;
        else cout << '>' << endl;
    }
    return 0;
}