Compilare: user.cpp: In function ‘int main()’: user.cpp:39:56: warning: array subscript has type ‘char’ [-Wchar-subscripts] dp[i][i+k-1] = dp[i+1][i+k-2] + cost[ s[i] ][ s[i+k-1] ]; ^ user.cpp:39:68: warning: array subscript has type ‘char’ [-Wchar-subscripts] dp[i][i+k-1] = dp[i+1][i+k-2] + cost[ s[i] ][ s[i+k-1] ]; ^ user.cpp: In function ‘void Read()’: user.cpp:20:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n",&N); ^ user.cpp:21:30: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets( s, NMax-1, stdin ); ^ user.cpp:24:72: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(j = 0; j < 26; ++j) scanf("%d",&cost[ 'a' + i ][ 'a' + j ]); ^ user.cpp: In function ‘int main()’: user.cpp:28:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("redu.in","r",stdin); ^ user.cpp:29:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("redu.out","w",stdout); ^