file.cc: In function ‘int main()’:
file.cc:66:23: error: narrowing conversion of ‘3.0e+0’ from ‘double’ to ‘int’ [-Wnarrowing]
   66 |   vector<int> a= { 3.0};
      |                       ^
file.cc: At global scope:
file.cc:39:13: warning: ‘void YES()’ defined but not used [-Wunused-function]
   39 | static void YES() {
      |             ^~~
file.cc:35:13: warning: ‘void NO()’ defined but not used [-Wunused-function]
   35 | static void NO() {
      |             ^~
cc1plus: note: unrecognized command-line option ‘-Wno-sign-promotion’ may have been intended to silence earlier diagnostics

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