Compilare: main.cpp: In function 'int main()': main.cpp:35:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("avele.in", "r", stdin); ^ main.cpp:36:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("avele.out", "w", stdout); ^ main.cpp:38:45: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ("%d%d%d", &n, &cost_add, &cost_rem); ^ main.cpp:41:33: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ("%d%d", &l[i], &r[i]); ^ main.cpp:47:14: warning: iteration 58 invokes undefined behavior [-Waggressive-loop-optimizations] dp[0][i] = cost_add + dp[0][i - 1] + dp[0][i - 2]; ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:46:17: note: within this loop for (i = 2; i <= LIM; i++) ~~^~~~~~ main.cpp:33:6: warning: 'sol' may be used uninitialized in this function [-Wmaybe-uninitialized] ll sol; ^~~