View Compilation Error

0_0_37846014_29832.cpp: In function 'int build(int, int)':
0_0_37846014_29832.cpp:29:16: error: 'tot' was not declared in this scope
     int rt = ++tot;
                ^
0_0_37846014_29832.cpp: In function 'int update(int, int, int, int)':
0_0_37846014_29832.cpp:42:16: error: 'tot' was not declared in this scope
     int rt = ++tot;
                ^
0_0_37846014_29832.cpp: In function 'int main(int, const char**)':
0_0_37846014_29832.cpp:69:5: error: 't' was not declared in this scope
     t = read();
     ^
0_0_37846014_29832.cpp:72:9: error: 'n' was not declared in this scope
         n = read(), m = read(), tot = 0;
         ^
0_0_37846014_29832.cpp:72:21: error: 'm' was not declared in this scope
         n = read(), m = read(), tot = 0;
                     ^
0_0_37846014_29832.cpp:72:33: error: 'tot' was not declared in this scope
         n = read(), m = read(), tot = 0;
                                 ^