#include #define REP(i, n) for(int i = 0; i < n; i++) #define REPR(i, n) for(int i = n; i >= 0; i--) #define FOR(i, m, n) for(int i = m; i < n; i++) #define INF 2e9 #define ALL(v) v.begin(), v.end() using namespace std; typedef long long ll; int main(){ int A, B, C; cin >> A >> B >> C; if (A + B == C) { cout << "correct" << endl; } else { cout << "incorrect" << endl; } }