运行 ID: 71732

Main.cc: In function ‘int main()’:
Main.cc:10:25: error: ‘N’ was not declared in this scope
     for (int i = 0; i < N; i++) {
                         ^
Main.cc:16:18: error: ‘N’ was not declared in this scope
     for (int i = N-1; i >=0; i=i-1) {
                  ^
Main.cc: In function ‘int main()’:
Main.cc:24:5: error: redefinition of ‘int main()’
 int main() {
     ^~~~
Main.cc:4:5: note: ‘int main()’ previously defined here
 int main() {
     ^~~~
Main.cc:30:25: error: ‘N’ was not declared in this scope
     for (int i = 0; i < N; i++) {
                         ^
Main.cc:36:18: error: ‘N’ was not declared in this scope
     for (int i = N-1; i >=0; i=i-1) {
                  ^