Language: C

8 5
7 5
1 7
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3 7#include<bits/stdc++.h>
using namespace std;
#define int long long
#define ll long long
#define mod ((ll)1e9+7)
#define inf 0x3f3f3f3f
#define infl 0x3f3f3f3f3f3f3f3f
#define Ninf -0x3e3e3e3f
#define Ninfl -0x3e3e3e3e3e3e3e3f
#define maxx ((ll)1e5+5)
#define endl "\n"
#define time(i) cout<<"\nTime Elapsed "<<i<<" : " << 1.0*clock() / CLOCKS_PER_SEC << " sec\n";
#define usefile freopen("input.txt","r",stdin); freopen("output.txt","w",stdout);
#define fast ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define test ll t; cin>>t; while(t--)
ll exp(ll x,ll y,ll p){ ll res=1; while(y) {if(y%2) res=(res*x%p)%p; x=(x*x)%p; y/=2; } return res;}
ll expm(ll x,ll y){ ll res=1; while(y) {if(y%2) res=(res*x%mod)%mod; x=(x*x)%mod; y/=2; } return res;}
ll add(ll x, ll y) { x += y; if (x >= mod) return x-mod; return x;}
ll sub(ll x, ll y) { x -= y; if (x < 0) return x + mod; return x;}
ll mult(ll x, ll y) { return (x * y) % mod;}
ll rev(ll x) { return expm(x, mod - 2);}
/*
bool sv[maxx]={0};    // returns 0 if a num is prime
int sp[maxx]={0};     // gives smallest prime factor of the number
void Sieve() {for(int i= 2; i< maxx; i+= 2) sv[i]=1,sp[i] = 2;sv[2]=0;for(ll i = 3; i < maxx; i += 2){if (!sv[i]){sp[i] = i;for (ll j = i; (j*i) < maxx; j += 2){if (!sv[j*i])sv[j*i] = true, sp[j*i] = i;}}}}
ll fact[maxx]={0}; // returns factorial of that number
void facto() {fact[0]=1;fact[1]=1;for(int i=2;i<maxx;i++)fact[i]=(fact[i-1]*i)%mod;}
ll ncrm(ll n,ll r) {ll res=1; res=fact[n]; res=(res*(expm(fact[r],mod-2)))%mod; res=(res*(expm(fact[n-r],mod-2)))%mod; return res;}
ll inv[maxx];   // returns the modular inverse of number
void inversify( ll m){inv[1]=1;for(int i=2;i<maxx;i++){inv[i]= m- m/i*inv[m%i]%m;}}
ll ncr(ll n,ll r,ll m){int ans=1;for (int i = 0; i < r; i++){ans=ans*(n-i)%m*inv[i+1]%m;}return ans;}
*/
signed main(){
  fast;
  test
  {
    
  }
  return 0;
}				
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Compiler output:
main.c:1:1: error: expected identifier or '(' before numeric constant
    1 | 8 5
      | ^
main.c:5:4: error: stray '#' in program
    5 | 3 7#include<bits/stdc++.h>
      |    ^
main.c:20:4: warning: conflicting types for built-in function 'exp'; expected 'double(double)' [-Wbuiltin-declaration-mismatch]
   20 | ll exp(ll x,ll y,ll p){ ll res=1; while(y) {if(y%2) res=(res*x%p)%p; x=(x*x)%p; y/=2; } return res;}
      |    ^~~
main.c:1:1: note: 'exp' is declared in header '<math.h>'
  +++ |+#include <math.h>
    1 | 8 5
main.c: In function 'main':
main.c:18:14: error: 'ios' undeclared (first use in this function)
   18 | #define fast ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
      |              ^~~
main.c:38:3: note: in expansion of macro 'fast'
   38 |   fast;
      |   ^~~~
main.c:18:14: note: each undeclared identifier is reported only once for each function it appears in
   18 | #define fast ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
      |              ^~~
main.c:38:3: note: in expansion of macro 'fast'
   38 |   fast;
      |   ^~~~
main.c:18:17: error: expected ';' before '::' token
   18 | #define fast ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
      |                 ^~
main.c:38:3: note: in expansion of macro 'fast'
   38 |   fast;
      |   ^~~~
main.c:18:39: error: 'cin' undeclared (first use in this function)
   18 | #define fast ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
      |                                       ^~~
main.c:38:3: note: in expansion of macro 'fast'
   38 |   fast;
      |   ^~~~
main.c:18:51: error: 'cout' undeclared (first use in this function)
   18 | #define fast ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
      |                                                   ^~~~
main.c:38:3: note: in expansion of macro 'fast'
   38 |   fast;
      |   ^~~~
main.c: At top level:
main.c:45:1: error: expected identifier or '(' before numeric constant
   45 | 8 3
      | ^