Compilare: user.cpp: In function ‘int main()’: user.cpp:6:13: warning: large integer implicitly truncated to unsigned type [-Woverflow] #define INF 20000 ^ user.cpp:81:23: note: in expansion of macro ‘INF’ unsigned char sol=INF; ^ user.cpp:96:21: warning: large integer implicitly truncated to unsigned type [-Woverflow] dp[i][j]=INF; ^ user.cpp:83:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("zip.in","r",stdin); ^ user.cpp:84:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("zip.out","w",stdout); ^ user.cpp:85:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &N,&M,&K); ^ user.cpp:87:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", (a[i]+1)); ^