Compilare: user.cpp: In function ‘int main()’: user.cpp:23:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("smooth.in", "r", stdin); ^ user.cpp:24:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("smooth.out", "w", stdout); ^ user.cpp:25:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld", &a, &b); ^ user.cpp:39:33: warning: iteration 23u invokes undefined behavior [-Waggressive-loop-optimizations] if(a <= val[e2][e3][e5][e7] && val[e2][e3][e5][e7] <= b) ^ user.cpp:29:3: note: containing loop for(int e5 = 0; e5 < 25; ++e5) ^ user.cpp:31:37: warning: iteration 23u invokes undefined behavior [-Waggressive-loop-optimizations] low[e2][e3][e5][e7] = 1000000000; ^ user.cpp:30:3: note: containing loop for(int e7 = 0; e7 < 25; ++e7) { ^