func_code_string: #include <bits/stdc++.h>   #pragma GCC optimize( Ofast )   #pragma GCC optimize( unroll-loops )   #pragma GCC target( sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native )   using namespace std;   mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());   unsigned char a[200042];   int main() {     ios::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     int n;     scanf( %d , &n);     for (int i = 0; i < n; ++i) scanf( %hhu , &a[i]);     int q;     scanf( %d , &q);     while (q--) {       int l, r;       unsigned char x, y;       scanf( %d%d%hhu%hhu , &l, &r, &x, &y);       for (int i = l - 1; i < r; i++) a[i] = a[i] == x ? y : a[i];     }     for (int i = 0; i < n; ++i) printf( %hhu  , a[i]);     return 0;   }   