Language: C

#include <bits/stdc++.h>
#include <set>
#define rep(i,n) for (int i=0; i < (n); ++i)
#define all(a) a.begin(), a.end()
using ll = long long;
using namespace std;
 

// 関数を作る
int gcd(int a, int b) {
  if (a == 0)
    return b;
  return gcd(b % a, a);
}
 
int main() {
  int a;
  cin >> a;
  int sum = 0;
  for (int i = 1; i <= a; i++) {
    for (int j = 1; j <= a; j++) {
      for (int k = 1; k <= a; k++) {
        sum += gcd(i, gcd(j, k));
      }
    }
  }
  cout << sum;
  return 0;
}

Compiler output:
main.c:1:9: error: #include expects "FILENAME" or <FILENAME>
    1 | #include <bits/stdc++.h>
      |         ^
main.c:2:9: error: #include expects "FILENAME" or <FILENAME>
    2 | #include <set>
      |         ^
main.c:3:8: error: macro names must be identifiers
    3 | #define rep(i,n) for (int i=0; i < (n); ++i)
      |        ^
main.c:4:8: error: macro names must be identifiers
    4 | #define all(a) a.begin(), a.end()
      |        ^
main.c:5:6: error: stray '\302' in program
    5 | using<U+00A0>ll<U+00A0>=<U+00A0>long<U+00A0>long;
      |      ^~~~~~~~
main.c:5:1: error: unknown type name 'using'
    5 | using ll = long long;
      | ^~~~~
main.c:5:9: error: stray '\302' in program
    5 | using<U+00A0>ll<U+00A0>=<U+00A0>long<U+00A0>long;
      |                ^~~~~~~~
main.c:5:11: error: stray '\302' in program
    5 | using<U+00A0>ll<U+00A0>=<U+00A0>long<U+00A0>long;
      |                         ^~~~~~~~
main.c:5:12: error: expected expression before 'long'
    5 | using ll = long long;
      |            ^~~~
main.c:5:16: error: stray '\302' in program
    5 | using<U+00A0>ll<U+00A0>=<U+00A0>long<U+00A0>long;
      |                                     ^~~~~~~~
main.c:6:6: error: stray '\302' in program
    6 | using<U+00A0>namespace<U+00A0>std;
      |      ^~~~~~~~
main.c:6:1: error: unknown type name 'using'
    6 | using namespace std;
      | ^~~~~
main.c:6:16: error: stray '\302' in program
    6 | using<U+00A0>namespace<U+00A0>std;
      |                       ^~~~~~~~
main.c:6:17: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'std'
    6 | using namespace std;
      |                 ^~~
main.c:7:1: error: stray '\302' in program
    7 | <U+00A0>
      | ^~~~~~~~
main.c:10:4: error: stray '\302' in program
   10 | int<U+00A0>gcd(int<U+00A0>a,<U+00A0>int<U+00A0>b)<U+00A0>{
      |    ^~~~~~~~
main.c:10:12: error: stray '\302' in program
   10 | int<U+00A0>gcd(int<U+00A0>a,<U+00A0>int<U+00A0>b)<U+00A0>{
      |                   ^~~~~~~~
main.c:10:15: error: stray '\302' in program
   10 | int<U+00A0>gcd(int<U+00A0>a,<U+00A0>int<U+00A0>b)<U+00A0>{
      |                             ^~~~~~~~
main.c:10:19: error: stray '\302' in program
   10 | int<U+00A0>gcd(int<U+00A0>a,<U+00A0>int<U+00A0>b)<U+00A0>{
      |                                        ^~~~~~~~
main.c:10:22: error: stray '\302' in program
   10 | int<U+00A0>gcd(int<U+00A0>a,<U+00A0>int<U+00A0>b)<U+00A0>{
      |                                                  ^~~~~~~~
main.c: In function 'gcd':
main.c:11:1: error: stray '\302' in program
   11 | <U+00A0><U+00A0>if<U+00A0>(a<U+00A0>==<U+00A0>0)
      | ^~~~~~~~
main.c:11:2: error: stray '\302' in program
   11 | <U+00A0><U+00A0>if<U+00A0>(a<U+00A0>==<U+00A0>0)
      |         ^~~~~~~~
main.c:11:5: error: stray '\302' in program
   11 | <U+00A0><U+00A0>if<U+00A0>(a<U+00A0>==<U+00A0>0)
      |                   ^~~~~~~~
main.c:11:8: error: stray '\302' in program
   11 | <U+00A0><U+00A0>if<U+00A0>(a<U+00A0>==<U+00A0>0)
      |                             ^~~~~~~~
main.c:11:11: error: stray '\302' in program
   11 | <U+00A0><U+00A0>if<U+00A0>(a<U+00A0>==<U+00A0>0)
      |                                       ^~~~~~~~
main.c:12:1: error: stray '\302' in program
   12 | <U+00A0><U+00A0><U+00A0><U+00A0>return<U+00A0>b;
      | ^~~~~~~~
main.c:12:2: error: stray '\302' in program
   12 | <U+00A0><U+00A0><U+00A0><U+00A0>return<U+00A0>b;
      |         ^~~~~~~~
main.c:12:3: error: stray '\302' in program
   12 | <U+00A0><U+00A0><U+00A0><U+00A0>return<U+00A0>b;
      |                 ^~~~~~~~
main.c:12:4: error: stray '\302' in program
   12 | <U+00A0><U+00A0><U+00A0><U+00A0>return<U+00A0>b;
      |                         ^~~~~~~~
main.c:12:11: error: stray '\302' in program
   12 | <U+00A0><U+00A0><U+00A0><U+00A0>return<U+00A0>b;
      |                                       ^~~~~~~~
main.c:13:1: error: stray '\302' in program
   13 | <U+00A0><U+00A0>return<U+00A0>gcd(b<U+00A0>%<U+00A0>a,<U+00A0>a);
      | ^~~~~~~~
main.c:13:2: error: stray '\302' in program
   13 | <U+00A0><U+00A0>return<U+00A0>gcd(b<U+00A0>%<U+00A0>a,<U+00A0>a);
      |         ^~~~~~~~
main.c:13:9: error: stray '\302' in program
   13 | <U+00A0><U+00A0>return<U+00A0>gcd(b<U+00A0>%<U+00A0>a,<U+00A0>a);
      |                       ^~~~~~~~
main.c:13:15: error: stray '\302' in program
   13 | <U+00A0><U+00A0>return<U+00A0>gcd(b<U+00A0>%<U+00A0>a,<U+00A0>a);
      |                                    ^~~~~~~~
main.c:13:17: error: stray '\302' in program
   13 | <U+00A0><U+00A0>return<U+00A0>gcd(b<U+00A0>%<U+00A0>a,<U+00A0>a);
      |                                             ^~~~~~~~
main.c:13:20: error: stray '\302' in program
   13 | <U+00A0><U+00A0>return<U+00A0>gcd(b<U+00A0>%<U+00A0>a,<U+00A0>a);
      |                                                       ^~~~~~~~
main.c: At top level:
main.c:15:1: error: stray '\302' in program
   15 | <U+00A0>
      | ^~~~~~~~
main.c:16:4: error: stray '\302' in program
   16 | int<U+00A0>main()<U+00A0>{
      |    ^~~~~~~~
main.c:16:11: error: stray '\302' in program
   16 | int<U+00A0>main()<U+00A0>{
      |                  ^~~~~~~~
main.c: In function 'main':
main.c:17:1: error: stray '\302' in program
   17 | <U+00A0><U+00A0>int<U+00A0>a;
      | ^~~~~~~~
main.c:17:2: error: stray '\302' in program
   17 | <U+00A0><U+00A0>int<U+00A0>a;
      |         ^~~~~~~~
main.c:17:6: error: stray '\302' in program
   17 | <U+00A0><U+00A0>int<U+00A0>a;
      |                    ^~~~~~~~
main.c:18:1: error: stray '\302' in program
   18 | <U+00A0><U+00A0>cin<U+00A0>>><U+00A0>a;
      | ^~~~~~~~
main.c:18:2: error: stray '\302' in program
   18 | <U+00A0><U+00A0>cin<U+00A0>>><U+00A0>a;
      |         ^~~~~~~~
main.c:18:6: error: stray '\302' in program
   18 | <U+00A0><U+00A0>cin<U+00A0>>><U+00A0>a;
      |                    ^~~~~~~~
main.c:18:3: error: 'cin' undeclared (first use in this function)
   18 |   cin >> a;
      |   ^~~
main.c:18:3: note: each undeclared identifier is reported only once for each function it appears in
main.c:18:9: error: stray '\302' in program
   18 | <U+00A0><U+00A0>cin<U+00A0>>><U+00A0>a;
      |                              ^~~~~~~~
main.c:19:1: error: stray '\302' in program
   19 | <U+00A0><U+00A0>int<U+00A0>sum<U+00A0>=<U+00A0>0;
      | ^~~~~~~~
main.c:19:2: error: stray '\302' in program
   19 | <U+00A0><U+00A0>int<U+00A0>sum<U+00A0>=<U+00A0>0;
      |         ^~~~~~~~
main.c:19:6: error: stray '\302' in program
   19 | <U+00A0><U+00A0>int<U+00A0>sum<U+00A0>=<U+00A0>0;
      |                    ^~~~~~~~
main.c:19:10: error: stray '\302' in program
   19 | <U+00A0><U+00A0>int<U+00A0>sum<U+00A0>=<U+00A0>0;
      |                               ^~~~~~~~
main.c:19:12: error: stray '\302' in program
   19 | <U+00A0><U+00A0>int<U+00A0>sum<U+00A0>=<U+00A0>0;
      |                                        ^~~~~~~~
main.c:20:1: error: stray '\302' in program
   20 | <U+00A0><U+00A0>for<U+00A0>(int<U+00A0>i<U+00A0>=<U+00A0>1;<U+00A0>i<U+00A0><=<U+00A0>a;<U+00A0>i++)<U+00A0>{
      | ^~~~~~~~
main.c:20:2: error: stray '\302' in program
   20 | <U+00A0><U+00A0>for<U+00A0>(int<U+00A0>i<U+00A0>=<U+00A0>1;<U+00A0>i<U+00A0><=<U+00A0>a;<U+00A0>i++)<U+00A0>{
      |         ^~~~~~~~
main.c:20:6: error: stray '\302' in program
   20 | <U+00A0><U+00A0>for<U+00A0>(int<U+00A0>i<U+00A0>=<U+00A0>1;<U+00A0>i<U+00A0><=<U+00A0>a;<U+00A0>i++)<U+00A0>{
      |                    ^~~~~~~~
main.c:20:11: error: stray '\302' in program
   20 | <U+00A0><U+00A0>for<U+00A0>(int<U+00A0>i<U+00A0>=<U+00A0>1;<U+00A0>i<U+00A0><=<U+00A0>a;<U+00A0>i++)<U+00A0>{
      |                                ^~~~~~~~
main.c:20:13: error: stray '\302' in program
   20 | <U+00A0><U+00A0>for<U+00A0>(int<U+00A0>i<U+00A0>=<U+00A0>1;<U+00A0>i<U+00A0><=<U+00A0>a;<U+00A0>i++)<U+00A0>{
      |                                         ^~~~~~~~
main.c:20:15: error: stray '\302' in program
   20 | <U+00A0><U+00A0>for<U+00A0>(int<U+00A0>i<U+00A0>=<U+00A0>1;<U+00A0>i<U+00A0><=<U+00A0>a;<U+00A0>i++)<U+00A0>{
      |                                                  ^~~~~~~~
main.c:20:18: error: stray '\302' in program
   20 | <U+00A0><U+00A0>for<U+00A0>(int<U+00A0>i<U+00A0>=<U+00A0>1;<U+00A0>i<U+00A0><=<U+00A0>a;<U+00A0>i++)<U+00A0>{
      |                                                            ^~~~~~~~
main.c:20:20: error: stray '\302' in program
   20 | <U+00A0><U+00A0>for<U+00A0>(int<U+00A0>i<U+00A0>=<U+00A0>1;<U+00A0>i<U+00A0><=<U+00A0>a;<U+00A0>i++)<U+00A0>{
      |                                                                     ^~~~~~~~
main.c:20:23: error: stray '\302' in program
   20 | <U+00A0><U+00A0>for<U+00A0>(int<U+00A0>i<U+00A0>=<U+00A0>1;<U+00A0>i<U+00A0><=<U+00A0>a;<U+00A0>i++)<U+00A0>{
      |                                                                               ^~~~~~~~
main.c:20:26: error: stray '\302' in program
   20 | <U+00A0><U+00A0>for<U+00A0>(int<U+00A0>i<U+00A0>=<U+00A0>1;<U+00A0>i<U+00A0><=<U+00A0>a;<U+00A0>i++)<U+00A0>{
      |                                                                                         ^~~~~~~~
main.c:20:31: error: stray '\302' in program
   20 | <U+00A0><U+00A0>for<U+00A0>(int<U+00A0>i<U+00A0>=<U+00A0>1;<U+00A0>i<U+00A0><=<U+00A0>a;<U+00A0>i++)<U+00A0>{
      |                                                                                                     ^~~~~~~~
main.c:21:1: error: stray '\302' in program
   21 | <U+00A0><U+00A0><U+00A0><U+00A0>for<U+00A0>(int<U+00A0>j<U+00A0>=<U+00A0>1;<U+00A0>j<U+00A0><=<U+00A0>a;<U+00A0>j++)<U+00A0>{
      | ^~~~~~~~
main.c:21:2: error: stray '\302' in program
   21 | <U+00A0><U+00A0><U+00A0><U+00A0>for<U+00A0>(int<U+00A0>j<U+00A0>=<U+00A0>1;<U+00A0>j<U+00A0><=<U+00A0>a;<U+00A0>j++)<U+00A0>{
      |         ^~~~~~~~
main.c:21:3: error: stray '\302' in program
   21 | <U+00A0><U+00A0><U+00A0><U+00A0>for<U+00A0>(int<U+00A0>j<U+00A0>=<U+00A0>1;<U+00A0>j<U+00A0><=<U+00A0>a;<U+00A0>j++)<U+00A0>{
      |                 ^~~~~~~~
main.c:21:4: error: stray '\302' in program
   21 | <U+00A0><U+00A0><U+00A0><U+00A0>for<U+00A0>(int<U+00A0>j<U+00A0>=<U+00A0>1;<U+00A0>j<U+00A0><=<U+00A0>a;<U