运行 ID: 33441

Main.cc: In function ‘int main()’:
Main.cc:48:9: error: ‘cn’ was not declared in this scope
         cn+=n;
         ^~
Main.cc:48:9: note: suggested alternative: ‘c’
         cn+=n;
         ^~
         c
Main.cc:52:13: warning: unused variable ‘lim’ [-Wunused-variable]
         int lim=min(n,3ll);
             ^~~