View Compilation Error

0_0_37522817_6492.cpp: In function 'void solve()':
0_0_37522817_6492.cpp:110:18: error: expected unqualified-id before '[' token
         for(auto [u, v] : pre[i]) {
                  ^
0_0_37522817_6492.cpp:110:18: error: expected ';' before '[' token
0_0_37522817_6492.cpp:110:19: error: 'u' was not declared in this scope
         for(auto [u, v] : pre[i]) {
                   ^
0_0_37522817_6492.cpp:110:22: error: 'v' was not declared in this scope
         for(auto [u, v] : pre[i]) {
                      ^
0_0_37522817_6492.cpp: In lambda function:
0_0_37522817_6492.cpp:110:25: error: expected '{' before ':' token
         for(auto [u, v] : pre[i]) {
                         ^
0_0_37522817_6492.cpp: In function 'void solve()':
0_0_37522817_6492.cpp:110:25: error: expected ';' before ':' token
0_0_37522817_6492.cpp:110:25: error: expected primary-expression before ':' token
0_0_37522817_6492.cpp:110:25: error: expected ')' before ':' token
0_0_37522817_6492.cpp:110:25: error: expected primary-expression before ':' token