func_code_string: // Cutiepie is a hoe!   #pragma comment(linker,  /stack:200000000 )   #pragma GCC optimize ( Ofast )   #pragma GCC target ( sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx )   #include <bits/stdc++.h>   using namespace std;      #define TRACE      #ifdef TRACE   #define trace(...) __f(#__VA_ARGS__, __VA_ARGS__)   template <typename Arg1>   void __f(const char* name, Arg1&& arg1){    cerr << name <<   :   << arg1 << std::endl;   }   template <typename Arg1, typename... Args>   void __f(const char* names, Arg1&& arg1, Args&&... args){    const char* comma = strchr(names + 1,  , );cerr.write(names, comma - names) <<   :   << arg1<<  |  ;__f(comma+1, args...);   }   #else   #define trace(...)   #endif      #define rep(i, a) for(int i = 0; i < (a); ++i)   #define repp(i, a, b) for(int i = a; i < (b); ++i)   #define trav(a, x) for(auto& a : x)   #define all(x) x.begin(), x.end()   #define sz(x) (int)(x).size()   #define fst first   #define snd second   #define mp make_pair   #define pb push_back   typedef long long ll;   typedef long double ld;   typedef pair<int, int> pii;   typedef vector<int> vi;      int a[1005][1005];   int ee[3][1005];   ll s[1005];   ll s2[1005];      void solve()   {     int n, k;     cin>>n>>k;     rep(i, k){       s[i] = 0;       rep(j, n)       {         cin>>a[i][j];         s[i] += 1LL*a[i][j];         s2[i] += 1LL*a[i][j]*a[i][j];       }     }     fflush(stdout);     int kk = 1;     ll change, vdif;     if(2*s[1] == s[0]+s[2]){       vdif = s[1]-s[0];     }else{       vdif = s[k-1]-s[k-2];     }     repp(i, 1, k)     {       if(vdif != s[i]-s[i-1]){         change = s[i]-s[i-1]-vdif;         kk = i;         break;       }     }     ll v2;     if(kk<=2){       v2 = s2[k-1]+s2[k-3]-2LL*s2[k-2];     }else{       v2 = s2[2]+s2[0]-2LL*s2[1];     }     ll v2_ = s2[kk+1]+s2[kk-1]-2LL*s2[kk];     rep(i, n)     {       ll x = a[kk][i];       ll y = x - change;       ll v2__ = v2_ + 2LL*x*x - 2LL*y*y;       if(v2 == v2__){         cout<<kk<<   <<y<<endl;         fflush(stdout);         return;       }     }   }      int main() {     cin.sync_with_stdio(0); cin.tie(0);     cin.exceptions(cin.failbit);     solve();     return 0;   }      