View Compilation Error

0_0_38530489_1251.cpp: In function 'void solve()':
0_0_38530489_1251.cpp:22:14: error: expected unqualified-id before '[' token
     for(auto [u,v]:mp1){
              ^
0_0_38530489_1251.cpp:22:14: error: expected ';' before '[' token
0_0_38530489_1251.cpp:22:15: error: 'u' was not declared in this scope
     for(auto [u,v]:mp1){
               ^
0_0_38530489_1251.cpp:22:17: error: 'v' was not declared in this scope
     for(auto [u,v]:mp1){
                 ^
0_0_38530489_1251.cpp: In lambda function:
0_0_38530489_1251.cpp:22:19: error: expected '{' before ':' token
     for(auto [u,v]:mp1){
                   ^
0_0_38530489_1251.cpp: In function 'void solve()':
0_0_38530489_1251.cpp:22:19: error: expected ';' before ':' token
0_0_38530489_1251.cpp:22:19: error: expected primary-expression before ':' token
0_0_38530489_1251.cpp:22:19: error: expected ')' before ':' token
0_0_38530489_1251.cpp:22:19: error: expected primary-expression before ':' token