Compilare: main.cpp: In function 'int main()': main.cpp:29:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("comisia.in", "r", stdin); ^ main.cpp:30:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("comisia.out", "w", stdout); ^ main.cpp: In function 'void precalc()': main.cpp:17:14: warning: iteration 200009 invokes undefined behavior [-Waggressive-loop-optimizations] comb[i][0] = 1; ~~~~~~~~~~~^~~ main.cpp:16:19: note: within this loop for(int i = 1; i <= MAXN; ++i) { ~~^~~~~~~