View Compilation Error

0_0_39378131_10000.cpp: In function 'int build(int, int)':
0_0_39378131_10000.cpp:29:16: error: 'tot' was not declared in this scope
   29 |     int rt = ++tot;
      |                ^~~
0_0_39378131_10000.cpp: In function 'int update(int, int, int, int)':
0_0_39378131_10000.cpp:42:16: error: 'tot' was not declared in this scope
   42 |     int rt = ++tot;
      |                ^~~
0_0_39378131_10000.cpp: In function 'int main(int, const char**)':
0_0_39378131_10000.cpp:69:5: error: 't' was not declared in this scope; did you mean 'tm'?
   69 |     t = read();
      |     ^
      |     tm
0_0_39378131_10000.cpp:72:9: error: 'n' was not declared in this scope
   72 |         n = read(), m = read(), tot = 0;
      |         ^
0_0_39378131_10000.cpp:72:21: error: 'm' was not declared in this scope; did you mean 'tm'?
   72 |         n = read(), m = read(), tot = 0;
      |                     ^
      |                     tm
0_0_39378131_10000.cpp:72:33: error: 'tot' was not declared in this scope
   72 |         n = read(), m = read(), tot = 0;
      |                                 ^~~