Compilare: user.cpp: In function ‘int calc(int)’: user.cpp:14:52: warning: no return statement in function returning non-void [-Wreturn-type] dp[i][j]=dp[i-1][j-e]+(t-e*a[i])/b[i],cost[i][j]=e;} ^ user.cpp: In function ‘int transpose()’: user.cpp:19:24: warning: no return statement in function returning non-void [-Wreturn-type] cost2[i][j]=cost[i][j];} ^ user.cpp: In function ‘int main()’: user.cpp:21:30: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("lapte.in","r",stdin); ^ user.cpp:22:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("lapte.out","w",stdout); ^ user.cpp:24:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&l); ^ user.cpp:26:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&a[i],&b[i]); ^