运行 ID: 36280

Main.cc: In function ‘void slv()’:
Main.cc:61:22: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses]
             int mid=l+r>>1;
                     ~^~
Main.cc: At global scope:
Main.cc:68:10: error: ‘::main’ must return ‘int’
 int main(){
          ^