Compilare: user.cpp: In function ‘int main()’: user.cpp:20:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (dp[ i ][ 0 ] = 1, k = 1; k <= i; k++) ^ user.cpp:32:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i <= m; ++i) ^ user.cpp:38:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 2; i <= m + 1; ++i) ^