运行 ID: 48679

Main.cc: In function ‘int f(int)’:
Main.cc:4:34: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses]
                        if(t%4==0 && t%100!=0 || t%400==0){
                           ~~~~~~~^~~~~~~~~~~
Main.cc:7:27: error: a function-definition is not allowed here before ‘{’ token
                 int main(){
                           ^
Main.cc:15:23: error: ‘sum’ was not declared in this scope
                 cout<