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View Compilation Error

0_0_37751408_1644.cpp: In function 'void calc(int, int)':
0_0_37751408_1644.cpp:14:29: error: expected unqualified-id before '[' token
  for(int i=n;i;i--)for(auto [j,k]:gr[i])bs[i]|=(bs[j]&qr[k]);
                             ^
0_0_37751408_1644.cpp:14:29: error: expected ';' before '[' token
0_0_37751408_1644.cpp:14:30: error: 'j' was not declared in this scope
  for(int i=n;i;i--)for(auto [j,k]:gr[i])bs[i]|=(bs[j]&qr[k]);
                              ^
0_0_37751408_1644.cpp:14:32: error: 'k' was not declared in this scope
  for(int i=n;i;i--)for(auto [j,k]:gr[i])bs[i]|=(bs[j]&qr[k]);
                                ^
0_0_37751408_1644.cpp: In lambda function:
0_0_37751408_1644.cpp:14:34: error: expected '{' before ':' token
  for(int i=n;i;i--)for(auto [j,k]:gr[i])bs[i]|=(bs[j]&qr[k]);
                                  ^
0_0_37751408_1644.cpp: In function 'void calc(int, int)':
0_0_37751408_1644.cpp:14:34: error: expected ';' before ':' token
0_0_37751408_1644.cpp:14:34: error: expected primary-expression before ':' token
0_0_37751408_1644.cpp:14:34: error: expected ')' before ':' token
0_0_37751408_1644.cpp:14:34: error: expected primary-expression before ':' token


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